:root {
    --ink: #251f12;
    --muted: #716853;
    --forest: #b8860b;
    --forest-2: #8f6508;
    --mint: #f4c542;
    --mint-soft: #fff5ce;
    --gold: #f4c542;
    --cream: #fff9e8;
    --paper: #ffffff;
    --line: rgba(37, 31, 18, 0.12);
    --shadow: 0 24px 70px rgba(184, 134, 11, 0.14);
    --logo-bg: #f4c542;
    --logo-fg: #151515;
    --on-forest: #151515;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--cream);
    line-height: 1.7;
}

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

img {
    display: block;
    max-width: 100%;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    width: 100%;
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 12px max(24px, calc((100vw - 1180px) / 2));
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    background: color-mix(in srgb, var(--cream) 88%, var(--paper));
    backdrop-filter: blur(18px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    white-space: nowrap;
}

.brand-logo {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 12px;
    color: var(--logo-fg);
    background: var(--logo-bg);
    font-size: 25px;
    font-weight: 950;
    line-height: 1;
}

.brand strong,
.brand small {
    display: block;
    line-height: 1.18;
}

.brand small {
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    color: var(--muted);
    font-size: 14px;
}

.site-nav a:hover {
    color: var(--forest);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle,
.language-select {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 16px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--forest);
    background: color-mix(in srgb, var(--paper) 66%, transparent);
    font: inherit;
    font-size: 14px;
    font-weight: 900;
    cursor: pointer;
}

.language-select {
    appearance: none;
    min-width: 92px;
    padding-right: 28px;
    background:
        linear-gradient(45deg, transparent 50%, var(--forest) 50%) calc(100% - 16px) 18px / 6px 6px no-repeat,
        linear-gradient(135deg, var(--forest) 50%, transparent 50%) calc(100% - 11px) 18px / 6px 6px no-repeat,
        color-mix(in srgb, var(--paper) 66%, transparent);
}

.theme-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: max(24px, calc((100vw - 1180px) / 2));
    z-index: 30;
    width: min(360px, calc(100vw - 32px));
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: color-mix(in srgb, var(--paper) 96%, transparent);
    box-shadow: 0 24px 70px rgba(21, 21, 21, 0.16);
    backdrop-filter: blur(18px);
}

.theme-panel[hidden] {
    display: none;
}

.theme-panel-section + .theme-panel-section {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.theme-panel-section strong {
    display: block;
    margin-bottom: 10px;
    font-size: 14px;
}

.swatch-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.swatch {
    cursor: pointer;
}

.swatch {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 11px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: var(--paper);
    font: inherit;
    font-size: 14px;
    font-weight: 800;
}

.swatch span {
    width: 14px;
    height: 14px;
    border-radius: 50%;
}

.swatch.active {
    border-color: var(--forest);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--forest) 16%, transparent);
}

.header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    border-radius: 999px;
    color: var(--on-forest);
    font-weight: 900;
    background: var(--forest);
    box-shadow: 0 14px 30px rgba(7, 59, 51, 0.18);
}

.hero {
    position: relative;
    min-height: calc(100svh - 76px);
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
    align-items: center;
    gap: 72px;
    padding: 86px max(24px, calc((100vw - 1180px) / 2)) 82px;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 72%;
    z-index: -2;
    background:
        radial-gradient(circle at 18% 12%, color-mix(in srgb, var(--mint) 23%, transparent), transparent 28%),
        radial-gradient(circle at 86% 8%, color-mix(in srgb, var(--gold) 18%, transparent), transparent 26%),
        linear-gradient(135deg, var(--cream) 0%, var(--mint-soft) 54%, color-mix(in srgb, var(--gold) 14%, var(--cream)) 100%);
}

.hero::after {
    content: "";
    position: absolute;
    right: -12vw;
    top: 12%;
    z-index: -1;
    width: 46vw;
    height: 46vw;
    border-radius: 50%;
    background: rgba(55, 200, 160, 0.12);
}

.hero-content {
    max-width: 650px;
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--forest);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.eyebrow.light {
    display: inline-flex;
    padding: 7px 12px;
    border: 1px solid color-mix(in srgb, var(--forest) 18%, transparent);
    border-radius: 999px;
    color: var(--forest);
    background: color-mix(in srgb, var(--paper) 72%, transparent);
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 24px;
    font-size: clamp(44px, 6.6vw, 78px);
    line-height: 1.04;
    letter-spacing: 0;
}

h2 {
    margin-bottom: 18px;
    font-size: clamp(30px, 4.1vw, 48px);
    line-height: 1.15;
    letter-spacing: 0;
}

h3 {
    margin-bottom: 10px;
    font-size: 22px;
    line-height: 1.28;
}

.lead {
    max-width: 610px;
    margin-bottom: 32px;
    color: var(--muted);
    font-size: 19px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 24px;
    border-radius: 999px;
    font-weight: 900;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn.primary {
    color: var(--on-forest);
    background: var(--forest);
    box-shadow: 0 18px 36px rgba(7, 59, 51, 0.22);
}

.btn.ghost {
    border: 1px solid color-mix(in srgb, var(--forest) 24%, transparent);
    color: var(--forest);
    background: color-mix(in srgb, var(--paper) 72%, transparent);
}

.hero-visual {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: var(--shadow);
    transform: rotate(-1.5deg);
}

.hero-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(255,255,255,0.28), transparent 34%);
}

.visual-top {
    display: flex;
    gap: 8px;
    padding: 18px;
    border-bottom: 1px solid var(--line);
    background: var(--mint-soft);
}

.visual-top span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gold);
}

.visual-top span:nth-child(2) {
    background: var(--mint);
}

.visual-top span:nth-child(3) {
    background: #9eb1aa;
}

.visual-hero {
    min-height: 350px;
    background:
        linear-gradient(90deg, color-mix(in srgb, var(--forest) 68%, transparent), color-mix(in srgb, var(--forest) 6%, transparent)),
        url("./assets/portal-hero-bg.jpg") center / cover no-repeat;
}

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

.visual-grid div {
    padding: 22px;
    background: var(--paper);
}

.visual-grid strong,
.visual-grid span {
    display: block;
}

.visual-grid strong {
    margin-bottom: 5px;
    color: var(--forest);
    font-size: 23px;
    line-height: 1.1;
}

.visual-grid span {
    color: var(--muted);
    font-size: 14px;
}

.section {
    padding: 94px max(24px, calc((100vw - 1180px) / 2));
    background: var(--paper);
}

.section-head {
    max-width: 820px;
    margin-bottom: 42px;
}

.section-head p:not(.eyebrow),
.service-card p,
.problem-grid p,
.case-copy p,
.showcase-copy p,
.timeline p,
.faq p,
.contact p {
    color: var(--muted);
}

.section-head.split {
    max-width: none;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
    align-items: end;
    gap: 48px;
}

.section-head.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.problems {
    background: var(--forest);
    color: var(--on-forest);
}

.problems .eyebrow,
.problems .section-head p {
    color: color-mix(in srgb, var(--on-forest) 72%, transparent);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1.12fr 1fr 1fr 1fr;
    gap: 14px;
}

.problem-grid article {
    min-height: 290px;
    padding: 28px;
    border: 1px solid color-mix(in srgb, var(--on-forest) 16%, transparent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--on-forest) 8%, transparent);
}

.problem-grid article:first-child {
    background: var(--mint-soft);
    color: var(--ink);
}

.problem-grid article:first-child p {
    color: var(--muted);
}

.problem-grid span {
    display: inline-block;
    margin-bottom: 52px;
    color: var(--gold);
    font-weight: 900;
}

.problem-grid article:first-child span {
    color: var(--forest);
}

.advantages {
    background: var(--paper);
}

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

.advantage-grid article {
    min-height: 245px;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: linear-gradient(180deg, var(--paper), color-mix(in srgb, var(--mint-soft) 60%, var(--paper)));
    box-shadow: 0 16px 42px rgba(7, 59, 51, 0.06);
}

.advantage-grid article:nth-child(2) {
    background: var(--mint-soft);
}

.advantage-grid article:nth-child(4) {
    color: var(--on-forest);
    background: linear-gradient(145deg, var(--forest), var(--forest-2));
}

.advantage-grid article:nth-child(4) p {
    color: color-mix(in srgb, var(--on-forest) 76%, transparent);
}

.advantage-grid span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 58px;
    height: 36px;
    margin-bottom: 30px;
    border-radius: 999px;
    color: var(--forest);
    background: rgba(215, 167, 72, 0.2);
    font-weight: 900;
}

.advantage-grid h3 {
    font-size: 23px;
}

.advantage-grid p {
    margin-top: 12px;
    color: var(--muted);
}

.services,
.faq {
    background: var(--cream);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    align-items: stretch;
}

.service-card {
    min-height: 390px;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: 0 16px 42px rgba(7, 59, 51, 0.06);
}

.service-card.featured {
    color: var(--on-forest);
    background: linear-gradient(145deg, var(--forest), var(--forest-2));
}

.service-card.featured p,
.service-card.featured li {
    color: color-mix(in srgb, var(--on-forest) 76%, transparent);
}

.service-card ul,
.contact-card ul {
    display: grid;
    gap: 10px;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

.service-card li,
.contact-card li {
    position: relative;
    padding-left: 22px;
}

.service-card li::before,
.contact-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--gold);
}

.case {
    display: grid;
    grid-template-columns: 1fr;
    gap: 38px;
    background: var(--paper);
}

.case-copy {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.8fr);
    align-items: end;
    column-gap: 44px;
    row-gap: 14px;
}

.case-copy > .eyebrow,
.case-copy > h2 {
    grid-column: 1 / -1;
}

.case-points {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 0;
}

.case-points div {
    padding: 18px 20px;
    border-left: 4px solid var(--gold);
    border-radius: 0 8px 8px 0;
    background: color-mix(in srgb, var(--mint-soft) 70%, var(--paper));
}

.case-points strong,
.case-points span {
    display: block;
}

.case-points strong {
    margin-bottom: 5px;
    color: var(--forest);
    font-size: 24px;
    line-height: 1.1;
}

.case-points span {
    color: var(--muted);
    font-size: 14px;
}

.compare-board {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
    align-items: stretch;
}

.compare-board figure,
.showcase-media {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: var(--shadow);
}

.compare-board figure.raised {
    transform: translateY(0);
}

.compare-label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--line);
}

.compare-label strong {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: 8px;
    color: #ffffff;
    background: #151515;
    font-size: 26px;
    line-height: 1;
}

.compare-label.new strong {
    color: var(--logo-fg);
    background: var(--logo-bg);
}

.compare-label span {
    color: var(--ink);
    font-weight: 900;
}

.compare-board img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: contain;
    object-position: top center;
    background: color-mix(in srgb, var(--mint-soft) 70%, var(--paper));
}

.compare-board figure.raised img {
    aspect-ratio: 16 / 9;
}

.compare-board figcaption {
    padding: 16px 18px;
    color: var(--muted);
    font-weight: 800;
}

.case-detail {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 56px;
    margin-top: 10px;
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--mint-soft);
}

.showcase-media img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    object-position: top center;
}

.check-list {
    display: grid;
    gap: 14px;
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 30px;
    color: var(--ink);
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 11px;
    height: 11px;
    border-radius: 999px;
    background: var(--forest);
}

.process {
    background:
        radial-gradient(circle at 12% 0%, color-mix(in srgb, var(--mint) 16%, transparent), transparent 28%),
        var(--cream);
}

.timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.timeline div {
    position: relative;
    min-height: 250px;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: 0 16px 42px rgba(7, 59, 51, 0.06);
}

.timeline span {
    display: inline-flex;
    margin-bottom: 48px;
    color: var(--gold);
    font-weight: 900;
}

.faq-list {
    display: grid;
    gap: 12px;
    max-width: 920px;
    margin: 0 auto;
}

details {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    box-shadow: 0 14px 38px rgba(7, 59, 51, 0.05);
}

summary {
    cursor: pointer;
    padding: 22px 24px;
    font-size: 18px;
    font-weight: 900;
}

details p {
    margin: -4px 24px 22px;
}

.contact {
    display: grid;
    grid-template-columns: 1fr 410px;
    align-items: center;
    gap: 52px;
    padding: 96px max(24px, calc((100vw - 1180px) / 2));
    color: var(--on-forest);
    background:
        radial-gradient(circle at 88% 10%, color-mix(in srgb, var(--gold) 22%, transparent), transparent 28%),
        linear-gradient(135deg, var(--forest), var(--forest-2));
}

.contact h2 {
    max-width: 760px;
}

.contact p {
    max-width: 720px;
    color: color-mix(in srgb, var(--on-forest) 74%, transparent);
}

.contact-info {
    display: grid;
    gap: 14px;
    max-width: 620px;
    margin-top: 34px;
}

.contact-info div {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 18px;
    align-items: baseline;
    padding: 16px 0;
    border-bottom: 1px solid color-mix(in srgb, var(--on-forest) 16%, transparent);
}

.contact-info span {
    color: color-mix(in srgb, var(--on-forest) 58%, transparent);
    font-weight: 800;
}

.contact-info strong,
.contact-info a {
    color: var(--on-forest);
    font-size: 20px;
    font-weight: 900;
}

.copyright {
    margin-top: 30px;
    font-size: 14px;
}

.copyright a {
    display: inline-block;
    margin-left: 12px;
    color: var(--on-forest);
    font-weight: 800;
}

.copyright a:hover {
    text-decoration: underline;
}

.contact-card {
    padding: 30px;
    border: 1px solid color-mix(in srgb, var(--on-forest) 18%, transparent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--on-forest) 10%, transparent);
    backdrop-filter: blur(16px);
}

.contact-card strong {
    display: block;
    margin-bottom: 18px;
    font-size: 22px;
}

.contact-card li {
    color: color-mix(in srgb, var(--on-forest) 78%, transparent);
}

.wechat-box {
    display: grid;
    gap: 4px;
    margin-top: 26px;
    padding: 18px;
    border: 1px solid color-mix(in srgb, var(--on-forest) 16%, transparent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--on-forest) 10%, transparent);
}

.wechat-box span,
.wechat-box small {
    color: color-mix(in srgb, var(--on-forest) 70%, transparent);
}

.wechat-box strong {
    color: var(--on-forest);
    font-size: 28px;
    line-height: 1.15;
    letter-spacing: 0.04em;
}

.contact-card .btn {
    width: 100%;
    margin-top: 28px;
}

.qr-card {
    text-align: center;
}

.qr-card img {
    width: 100%;
    max-width: 310px;
    margin: 0 auto 22px;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.18);
}

.qr-card p {
    margin: -8px auto 0;
    color: color-mix(in srgb, var(--on-forest) 68%, transparent);
}

@media (max-width: 1020px) {
    .site-nav {
        display: none;
    }

    .hero,
    .section-head.split,
    .case-copy,
    .case,
    .case-detail,
    .contact {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        transform: none;
    }

    .problem-grid,
    .advantage-grid,
    .service-grid,
    .timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .compare-board,
    .visual-grid {
        grid-template-columns: 1fr;
    }

}

@media (max-width: 680px) {
    .site-header {
        min-height: 68px;
        padding-left: 16px;
        padding-right: 16px;
    }

    .header-cta {
        display: none;
    }

    .theme-toggle {
        min-height: 38px;
        padding: 0 12px;
        font-size: 13px;
    }

    .theme-panel {
        right: 16px;
    }

    .brand small {
        display: none;
    }

    .brand-logo {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        font-size: 22px;
    }

    .hero {
        min-height: auto;
        padding: 58px 20px 64px;
        gap: 42px;
    }

    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 30px;
    }

    .lead {
        font-size: 17px;
    }

    .hero-actions,
    .btn {
        width: 100%;
    }

    .visual-hero {
        min-height: 240px;
    }

    .problem-grid,
    .advantage-grid,
    .service-grid,
    .case-points,
    .timeline {
        grid-template-columns: 1fr;
    }

    .problem-grid article,
    .advantage-grid article,
    .service-card,
    .timeline div {
        min-height: auto;
    }

    .problem-grid span,
    .advantage-grid span,
    .timeline span {
        margin-bottom: 24px;
    }

    .section,
    .contact {
        padding: 72px 20px;
    }

    .contact-info div {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .contact-info strong,
    .contact-info a {
        font-size: 18px;
    }

    .contact-card {
        padding: 24px;
    }
}