* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    --store-primary: #0f766e;
    --store-primary-light: #14b8a6;
    --store-primary-deep: #0b5f59;
    --store-primary-rgb: 15, 118, 110;
    --store-primary-soft: #ecfdf5;
    --store-primary-border: #a7f3d0;
    --store-bg: #f3f6f6;
    --store-surface: #ffffff;
    --store-text: #172126;
    --store-text-strong: #0f172a;
    --store-text-secondary: #66747b;
    --store-border: #e4eaea;
    --store-status-warning: #d97706;
    --store-status-warning-soft: #fffbeb;
    --store-status-warning-border: #fde68a;
    --store-radius: 10px;
    --store-shadow: 0 8px 24px rgba(15, 61, 61, .08);
    --store-shadow-hover: 0 12px 30px rgba(15, 61, 61, .13);
}

body.skin-blue {
    --store-primary: #2563eb;
    --store-primary-light: #3b82f6;
    --store-primary-deep: #1d4ed8;
    --store-primary-rgb: 37, 99, 235;
    --store-primary-soft: #eff6ff;
    --store-primary-border: #bfdbfe;
}

body.skin-purple {
    --store-primary: #7c3aed;
    --store-primary-light: #8b5cf6;
    --store-primary-deep: #6d28d9;
    --store-primary-rgb: 124, 58, 237;
    --store-primary-soft: #f5f3ff;
    --store-primary-border: #ddd6fe;
}

body.skin-red {
    --store-primary: #dc2626;
    --store-primary-light: #ef4444;
    --store-primary-deep: #b91c1c;
    --store-primary-rgb: 220, 38, 38;
    --store-primary-soft: #fef2f2;
    --store-primary-border: #fecaca;
}

body.skin-yellow {
    --store-primary: #d97706;
    --store-primary-light: #f59e0b;
    --store-primary-deep: #b45309;
    --store-primary-rgb: 217, 119, 6;
    --store-primary-soft: #fffbeb;
    --store-primary-border: #fde68a;
}

body.theme-white {
    --store-bg: #f8fafc;
    --store-surface: #ffffff;
    --store-text: #172126;
    --store-text-strong: #0f172a;
    --store-text-secondary: #66747b;
    --store-border: #e5edf0;
}

body.theme-light {
    --store-bg: var(--store-primary-soft);
}

body.theme-blue {
    --store-bg: #f1f5f9;
    --store-surface: #ffffff;
    --store-text: #172126;
    --store-text-strong: #0f172a;
    --store-text-secondary: #64748b;
    --store-border: #dbe4ea;
}

body.system-intro-page {
    min-height: 100vh;
    margin: 0;
    background: #f5f7f8;
    color: #182432;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.65;
}

.intro-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 16px clamp(22px, 5vw, 72px);
    border-bottom: 1px solid rgba(15, 118, 110, .12);
    background: rgba(255, 255, 255, .95);
    backdrop-filter: blur(14px);
}

.intro-logo,
.intro-nav a {
    text-decoration: none;
}

.intro-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #0f3f3c;
    font-size: 17px;
    font-weight: 750;
}

.intro-logo:hover,
.intro-logo:focus {
    color: #0f766e;
    text-decoration: none;
}

.intro-logo__mark {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    display: block;
    border-radius: 10px;
    object-fit: contain;
}

.intro-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    flex-wrap: wrap;
}

.intro-nav a {
    padding: 8px 11px;
    border-radius: 8px;
    color: #526172;
    font-size: 14px;
    font-weight: 650;
}

.intro-nav a:hover,
.intro-nav a:focus {
    background: #eef7f5;
    color: #0f766e;
    text-decoration: none;
}

.intro-nav .intro-nav__login {
    background: #0f766e;
    color: #fff;
}

.intro-nav .intro-nav__login:hover,
.intro-nav .intro-nav__login:focus {
    background: #0b5f59;
    color: #fff;
}

.intro-hero {
    display: grid;
    grid-template-columns: minmax(560px, 1.25fr) minmax(360px, .75fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: center;
    padding: clamp(38px, 5vw, 68px) clamp(22px, 5vw, 72px);
    background:
        radial-gradient(circle at 82% 16%, rgba(20, 184, 166, .18), transparent 28%),
        linear-gradient(135deg, #ffffff 0%, #eff8f6 48%, #e9eef7 100%);
}

.intro-kicker {
    width: max-content;
    max-width: 100%;
    margin: 0 0 18px;
    padding: 8px 14px;
    border: 1px solid rgba(15, 118, 110, .2);
    border-radius: 999px;
    background: rgba(255, 255, 255, .8);
    color: #0f766e;
    font-weight: 750;
}

.intro-hero h1 {
    max-width: 760px;
    margin: 0;
    color: #102a43;
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 850;
    line-height: 1.14;
    letter-spacing: 0;
}

.intro-hero__lead {
    margin: 22px 0 0;
    max-width: 760px;
    color: #526172;
    font-size: 18px;
}

.intro-principle {
    display: inline-flex;
    align-items: center;
    max-width: min(100%, 860px);
    gap: 10px;
    margin-top: 28px;
    padding: 13px 16px;
    border: 1px solid rgba(15, 118, 110, .2);
    border-left: 4px solid #14b8a6;
    border-radius: 8px;
    background: rgba(255, 255, 255, .8);
    color: #0f514d;
    font-size: 17px;
    font-weight: 750;
    white-space: nowrap !important;
}

.intro-principle i {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    line-height: 1;
    color: #0f766e;
}

.intro-principle i:before {
    display: block;
    line-height: 18px;
}

.intro-hero__panel,
.placeholder-visual,
.feature-card,
.innovation-card,
.scenario-grid article,
.showcase-card {
    border: 1px solid rgba(24, 36, 50, .1);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 16px 42px rgba(24, 36, 50, .08);
}

.intro-hero__panel {
    overflow: hidden;
    padding: 14px;
}

.placeholder-visual {
    min-height: 228px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 12px;
    background:
        linear-gradient(135deg, rgba(15, 118, 110, .08), rgba(59, 130, 246, .08)),
        repeating-linear-gradient(135deg, rgba(15, 118, 110, .08) 0, rgba(15, 118, 110, .08) 1px, transparent 1px, transparent 18px);
    color: #0f766e;
    text-align: center;
}

.placeholder-visual i {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 10px 22px rgba(24, 36, 50, .1);
    font-size: 22px;
}

.placeholder-visual span,
.placeholder-visual p {
    margin: 0;
    color: #0f514d;
    font-weight: 750;
}

.placeholder-visual--hero {
    min-height: 360px;
    align-items: stretch;
    justify-content: flex-start;
    padding: 20px;
    gap: 18px;
    text-align: left;
}

.placeholder-toolbar {
    display: flex;
    gap: 7px;
}

.placeholder-toolbar span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(15, 118, 110, .26);
}

.placeholder-layout {
    flex: 1;
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 16px;
}

.placeholder-sidebar,
.placeholder-main {
    border-radius: 8px;
    background: rgba(255, 255, 255, .7);
}

.placeholder-sidebar {
    min-height: 240px;
}

.placeholder-main {
    padding: 18px;
}

.placeholder-line {
    height: 16px;
    border-radius: 999px;
    background: rgba(15, 118, 110, .18);
}

.placeholder-line--wide {
    width: 70%;
}

.placeholder-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.placeholder-cards span {
    min-height: 58px;
    border-radius: 8px;
    background: rgba(15, 118, 110, .12);
}

.placeholder-chart {
    min-height: 84px;
    margin-top: 18px;
    border-radius: 8px;
    background: linear-gradient(90deg, rgba(15, 118, 110, .14), rgba(20, 184, 166, .24));
}

.intro-summary {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
    padding: 20px clamp(22px, 5vw, 72px);
    background: #fff;
}

.intro-summary article {
    min-height: 104px;
    padding: 20px;
    border: 1px solid #e6ecef;
    border-radius: 8px;
    background: #fbfcfd;
}

.intro-summary strong {
    display: block;
    color: #0f766e;
    font-size: 22px;
}

.intro-summary span {
    display: block;
    margin-top: 6px;
    color: #596777;
    font-size: 14px;
}

.intro-section {
    padding: clamp(36px, 5vw, 56px) clamp(22px, 5vw, 72px);
}

.intro-section--soft {
    background: #edf5f4;
}

.intro-section__heading {
    max-width: 780px;
    margin-bottom: 28px;
}

.intro-section__heading--wide {
    max-width: 1120px;
}

.intro-section__heading p {
    margin: 0 0 7px;
    color: #0f766e;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.intro-section__heading h2,
.intro-closing h2 {
    margin: 0;
    color: #102a43;
    font-size: clamp(26px, 3vw, 38px);
    font-weight: 850;
    letter-spacing: 0;
}

.intro-section__heading span {
    display: block;
    margin-top: 12px;
    color: #5f6e7d;
    font-size: 16px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.feature-card {
    min-height: 232px;
    padding: 24px;
}

.feature-card i {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 8px;
    background: #ecfdf5;
    color: #0f766e;
    font-size: 18px;
}

.feature-card h3,
.innovation-card h3,
.scenario-grid h3,
.showcase-card h3 {
    margin: 0 0 10px;
    color: #102a43;
    font-size: 20px;
    font-weight: 800;
}

.feature-card p,
.innovation-card p,
.scenario-grid p,
.showcase-card p {
    margin: 0;
    color: #5f6e7d;
    font-size: 15px;
}

.innovation-layout {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.innovation-card {
    padding: 26px;
}

.innovation-card__icon {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 8px;
    background: #ecfdf5;
    color: #0f766e;
    font-size: 19px;
}

.innovation-card ul {
    display: grid;
    gap: 8px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.innovation-card li {
    position: relative;
    padding-left: 18px;
    color: #526172;
    font-size: 14px;
}

.innovation-card li:before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #14b8a6;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.scenario-grid article {
    padding: 24px;
}

.scenario-grid i {
    display: inline-flex;
    margin-bottom: 16px;
    color: #0f766e;
    font-size: 28px;
}

.roadmap-section {
    background:
        linear-gradient(135deg, rgba(255, 251, 235, .92), rgba(239, 246, 255, .92)),
        #fff;
    border-top: 1px solid rgba(217, 119, 6, .18);
    border-bottom: 1px solid rgba(15, 118, 110, .12);
}

.intro-section__heading .roadmap-label {
    width: max-content;
    max-width: 100%;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    padding: 7px 12px;
    border: 1px solid rgba(217, 119, 6, .22);
    border-radius: 999px;
    background: #fff7ed;
    color: #b45309;
    letter-spacing: 0;
}

.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.roadmap-grid article {
    min-height: 238px;
    position: relative;
    padding: 24px;
    border: 1px solid rgba(217, 119, 6, .18);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 16px 42px rgba(24, 36, 50, .08);
}

.roadmap-grid em {
    position: absolute;
    top: 18px;
    right: 18px;
    padding: 4px 8px;
    border-radius: 999px;
    background: #fffbeb;
    color: #b45309;
    font-size: 12px;
    font-style: normal;
    font-weight: 750;
}

.roadmap-grid i {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    border-radius: 8px;
    background: #ecfdf5;
    color: #0f766e;
    font-size: 21px;
}

.roadmap-grid h3 {
    margin: 0 0 10px;
    color: #102a43;
    font-size: 20px;
    font-weight: 800;
}

.roadmap-grid p {
    margin: 0;
    color: #5f6e7d;
    font-size: 15px;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.showcase-card {
    overflow: hidden;
}

.showcase-card--wide {
    grid-column: 1 / -1;
}

.showcase-card .placeholder-visual {
    min-height: 260px;
    border: 0;
    border-bottom: 1px solid rgba(24, 36, 50, .1);
    border-radius: 0;
    box-shadow: none;
}

.showcase-card h3,
.showcase-card p {
    padding-left: 20px;
    padding-right: 20px;
}

.showcase-card h3 {
    padding-top: 18px;
}

.showcase-card p {
    padding-bottom: 20px;
}

.intro-closing {
    padding: 38px clamp(22px, 5vw, 72px);
    background: #102a43;
    color: #fff;
}

.intro-closing p {
    margin: 0 0 8px;
    color: #95f0e4;
    font-weight: 750;
}

.intro-closing h2 {
    max-width: none;
    color: #fff;
    font-size: clamp(22px, 2.5vw, 34px);
    white-space: nowrap !important;
}

/* 与后台主题保持一致的轻量视觉覆盖 */
body.system-intro-page {
    background: var(--store-bg);
    color: var(--store-text);
}

.intro-header {
    border-bottom-color: var(--store-border);
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 2px 14px rgba(15, 61, 61, .05);
}

.intro-logo {
    color: var(--store-text-strong);
}

.intro-logo:hover,
.intro-logo:focus,
.intro-nav a:hover,
.intro-nav a:focus {
    color: var(--store-primary);
}

.intro-logo__mark {
    border-radius: 10px;
}

.intro-nav a {
    color: var(--store-text-secondary);
}

.intro-nav a:hover,
.intro-nav a:focus {
    background: var(--store-primary-soft);
}

.intro-nav .intro-nav__login {
    border: 1px solid var(--store-primary);
    background: var(--store-primary);
}

.intro-nav .intro-nav__login:hover,
.intro-nav .intro-nav__login:focus {
    border-color: var(--store-primary-deep);
    background: var(--store-primary-deep);
}

.intro-hero {
    background:
        linear-gradient(135deg, #ffffff 0%, var(--store-primary-soft) 56%, #f8fafc 100%);
}

.intro-kicker,
.intro-principle,
.intro-summary article,
.feature-card,
.innovation-card,
.scenario-grid article,
.showcase-card,
.intro-hero__panel,
.placeholder-visual,
.roadmap-grid article {
    border-color: var(--store-border);
    border-radius: var(--store-radius);
    box-shadow: var(--store-shadow);
}

.intro-kicker {
    color: var(--store-primary);
    border-color: rgba(var(--store-primary-rgb), .18);
    background: rgba(255, 255, 255, .82);
}

.intro-hero h1,
.intro-section__heading h2,
.intro-closing h2,
.feature-card h3,
.innovation-card h3,
.scenario-grid h3,
.showcase-card h3,
.roadmap-grid h3 {
    color: var(--store-text-strong);
}

.intro-hero__lead,
.intro-section__heading span,
.feature-card p,
.innovation-card p,
.scenario-grid p,
.showcase-card p,
.roadmap-grid p,
.intro-summary span,
.innovation-card li {
    color: var(--store-text-secondary);
}

.intro-principle {
    max-width: min(100%, 860px);
    border-color: rgba(var(--store-primary-rgb), .16);
    border-left-color: var(--store-primary-light);
    background: rgba(255, 255, 255, .82);
    color: var(--store-primary-deep);
}

.intro-principle i,
.intro-section__heading p,
.intro-summary strong,
.scenario-grid i {
    color: var(--store-primary);
}

.intro-summary {
    background: var(--store-surface);
}

.intro-summary article {
    background: #fbfdfd;
}

.intro-section--soft {
    background: var(--store-primary-soft);
}

.feature-card i,
.innovation-card__icon,
.roadmap-grid i,
.placeholder-visual i {
    border-radius: 10px;
    color: var(--store-primary);
    background: var(--store-primary-soft);
}

.innovation-card li:before {
    background: var(--store-primary-light);
}

.placeholder-visual {
    background:
        linear-gradient(135deg, rgba(var(--store-primary-rgb), .08), rgba(37, 99, 235, .06)),
        repeating-linear-gradient(135deg, rgba(var(--store-primary-rgb), .07) 0, rgba(var(--store-primary-rgb), .07) 1px, transparent 1px, transparent 18px);
    color: var(--store-primary);
}

.placeholder-visual span,
.placeholder-visual p {
    color: var(--store-primary-deep);
}

.placeholder-toolbar span,
.placeholder-line,
.placeholder-cards span {
    background: rgba(var(--store-primary-rgb), .16);
}

.placeholder-chart {
    background: linear-gradient(90deg, rgba(var(--store-primary-rgb), .12), rgba(var(--store-primary-rgb), .24));
}

.roadmap-section {
    border-top-color: var(--store-status-warning-border);
    border-bottom-color: var(--store-border);
    background:
        linear-gradient(135deg, rgba(255, 251, 235, .72), rgba(248, 250, 252, .94)),
        var(--store-surface);
}

.intro-section__heading .roadmap-label,
.roadmap-grid em {
    color: #b45309;
    border-color: var(--store-status-warning-border);
    background: var(--store-status-warning-soft);
}

.roadmap-grid article {
    border-color: rgba(217, 119, 6, .16);
}

.intro-closing {
    background: linear-gradient(135deg, var(--store-primary-deep), #123b3d);
}

.intro-closing p {
    color: #a7f3d0;
}

.intro-closing h2 {
    color: #fff;
}

body.button-style-solid .intro-nav .intro-nav__login {
    box-shadow: 0 7px 16px rgba(var(--store-primary-rgb), .22);
}

body.button-style-soft .intro-nav .intro-nav__login {
    color: var(--store-primary-deep);
    border-color: var(--store-primary-border);
    background: var(--store-primary-soft);
}

body.button-style-soft .intro-nav .intro-nav__login:hover,
body.button-style-soft .intro-nav .intro-nav__login:focus {
    color: #fff;
    border-color: var(--store-primary);
    background: var(--store-primary);
}

@media screen and (max-width: 1080px) {
    .intro-hero,
    .innovation-layout {
        grid-template-columns: 1fr;
    }

    .intro-summary,
    .feature-grid,
    .scenario-grid,
    .roadmap-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media screen and (max-width: 760px) {
    .intro-header {
        position: static;
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
        padding: 14px 18px;
    }

    .intro-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .intro-nav a {
        padding: 7px 9px;
        font-size: 13px;
    }

    .intro-hero,
    .intro-section,
    .intro-summary,
    .intro-closing {
        padding-left: 18px;
        padding-right: 18px;
    }

    .intro-hero {
        padding-top: 34px;
    }

    .intro-hero__lead,
    .intro-section__heading span {
        font-size: 16px;
    }

    .intro-principle {
        align-items: center;
        padding: 11px 12px;
        white-space: nowrap !important;
    }

    .placeholder-layout {
        grid-template-columns: 1fr;
    }

    .placeholder-sidebar {
        display: none;
    }

    .intro-summary,
    .feature-grid,
    .scenario-grid,
    .roadmap-grid,
    .showcase-grid {
        grid-template-columns: 1fr;
    }

    .intro-closing h2 {
        white-space: nowrap !important;
    }
}

@media screen and (max-width: 480px) {
    .intro-principle {
        gap: 6px;
        max-width: calc(100vw - 36px);
        padding: 9px 10px;
        font-size: 14px;
        white-space: nowrap !important;
    }

    .intro-principle i {
        width: 15px;
        height: 15px;
    }

    .intro-principle i:before {
        line-height: 15px;
    }

    .intro-closing h2 {
        font-size: 17px;
        line-height: 1.35;
        white-space: nowrap !important;
    }
}

@media screen and (max-width: 340px) {
    .intro-principle,
    .intro-closing h2 {
        white-space: normal !important;
    }
}