:root {
    --ink: #172033;
    --muted: #60708a;
    --paper: #fffdf9;
    --surface: #ffffff;
    --line: #e7e9ee;
    --orange: #ef7c3d;
    --orange-dark: #c95320;
    --teal: #2c7c7b;
    --shadow: 0 18px 50px rgba(27, 38, 59, 0.10);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.65;
}

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

a:focus-visible {
    outline: 3px solid rgba(239, 124, 61, 0.45);
    outline-offset: 3px;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(231, 233, 238, 0.75);
    background: rgba(255, 253, 249, 0.9);
    backdrop-filter: blur(16px);
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    font-weight: 750;
    letter-spacing: 0.01em;
}

.brand-mark {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: 11px;
    color: #fff;
    background: linear-gradient(135deg, var(--orange), #f2a15e);
    box-shadow: 0 7px 16px rgba(239, 124, 61, 0.28);
}

.nav-links {
    display: flex;
    gap: 24px;
    color: #42506a;
    font-size: 0.94rem;
}

.nav-links a:hover {
    color: var(--orange-dark);
}

.hero {
    overflow: hidden;
    position: relative;
    padding: 112px 0 98px;
    background:
        radial-gradient(circle at 82% 18%, rgba(239, 124, 61, 0.18), transparent 28%),
        radial-gradient(circle at 70% 77%, rgba(44, 124, 123, 0.12), transparent 30%),
        linear-gradient(120deg, #fffaf2, #f7fbfc);
}

.hero::after {
    content: "";
    position: absolute;
    width: 440px;
    height: 440px;
    right: -185px;
    bottom: -250px;
    border: 46px solid rgba(44, 124, 123, 0.08);
    border-radius: 50%;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
    align-items: center;
    gap: 72px;
}

.eyebrow {
    margin: 0 0 16px;
    color: var(--orange-dark);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
}

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

h1 {
    max-width: 720px;
    margin-bottom: 22px;
    font-size: clamp(2.25rem, 5vw, 4.4rem);
    line-height: 1.12;
    letter-spacing: -0.045em;
}

.hero-copy {
    max-width: 610px;
    color: var(--muted);
    font-size: 1.08rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    border: 1px solid transparent;
    border-radius: 12px;
    font-weight: 650;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

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

.button-primary {
    color: #fff;
    background: var(--orange);
    box-shadow: 0 10px 20px rgba(239, 124, 61, 0.25);
}

.button-primary:hover {
    background: var(--orange-dark);
}

.button-secondary {
    border-color: #d8dfe8;
    background: rgba(255, 255, 255, 0.75);
}

.button-secondary:hover {
    background: #fff;
}

.text-link {
    display: inline-block;
    margin-top: 20px;
    color: var(--orange-dark);
    font-weight: 700;
}

.text-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.text-link-light {
    color: #f8bd87;
}

.hero-card {
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow);
}

.hero-card-label {
    color: var(--teal);
    font-size: 0.84rem;
    font-weight: 700;
}

.hero-card h2 {
    margin: 12px 0 16px;
    font-size: 1.7rem;
    line-height: 1.25;
}

.hero-card p {
    margin-bottom: 0;
    color: var(--muted);
}

.section {
    padding: 92px 0;
}

.section-alt {
    background: #f5f8f9;
}

.section-soft {
    background: #fff8f2;
}

.section-heading {
    max-width: 670px;
    margin-bottom: 42px;
}

.section-heading h2 {
    margin-bottom: 12px;
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 1.22;
    letter-spacing: -0.025em;
}

.section-heading p {
    margin-bottom: 0;
    color: var(--muted);
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.card {
    min-height: 212px;
    padding: 27px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
}

.card-number {
    display: inline-grid;
    width: 31px;
    height: 31px;
    place-items: center;
    border-radius: 50%;
    color: var(--orange-dark);
    background: #fff0e7;
    font-size: 0.82rem;
    font-weight: 750;
}

.card h3 {
    margin: 20px 0 9px;
    font-size: 1.12rem;
}

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

.split-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(330px, 0.98fr);
    align-items: center;
    gap: 56px;
}

.section-heading-compact {
    margin-bottom: 0;
}

.section-heading .button {
    margin-top: 26px;
}

.summary-list {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface);
}

.summary-list dt {
    padding: 18px 22px 3px;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
}

.summary-list dd {
    margin: 0;
    padding: 0 22px 18px;
    border-bottom: 1px solid var(--line);
    font-weight: 650;
}

.summary-list dd:last-child {
    border-bottom: 0;
}

.summary-list a,
.article-layout a {
    color: var(--orange-dark);
}

.summary-list a:hover,
.article-layout a:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.product-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    overflow: hidden;
    border-radius: 24px;
    background: #1f3b4d;
    color: #fff;
}

.product-copy {
    padding: 44px;
}

.product-copy h2 {
    margin: 12px 0 16px;
    font-size: 2.1rem;
}

.product-copy p {
    color: rgba(255, 255, 255, 0.76);
}

.product-points {
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

.product-points li {
    margin: 11px 0;
    color: rgba(255, 255, 255, 0.86);
}

.product-points li::before {
    content: "✓";
    margin-right: 10px;
    color: #f5ad67;
    font-weight: 750;
}

.product-art {
    display: grid;
    min-height: 310px;
    place-items: center;
    padding: 35px;
    background: linear-gradient(145deg, #285e68, #e98746);
}

.word-card {
    width: min(265px, 100%);
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, 0.65);
    border-radius: 18px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 20px 40px rgba(12, 32, 41, 0.28);
    transform: rotate(4deg);
}

.word-card small {
    color: var(--teal);
    font-weight: 700;
}

.word-card strong {
    display: block;
    margin: 11px 0 4px;
    font-size: 2.15rem;
    letter-spacing: -0.04em;
}

.word-card span {
    color: var(--muted);
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
}

.contact-intro p {
    color: var(--muted);
}

.contact-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.contact-list li {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.contact-list strong,
.contact-list span {
    display: block;
}

.contact-list strong {
    margin-bottom: 3px;
    font-size: 0.88rem;
}

.contact-list span,
.contact-list a {
    color: var(--muted);
}

.contact-list a:hover {
    color: var(--orange-dark);
}

.site-footer {
    padding: 30px 0;
    color: #768197;
    background: #172033;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    font-size: 0.88rem;
}

.footer-inner-rich nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 16px;
}

.footer-inner a:hover {
    color: #fff;
}

/* ICP 备案号，备案下发后启用页脚注释即可生效 */
.beian a {
    color: #768197;
    text-decoration: none;
}

.legal-page {
    min-height: 100vh;
    background: #f7f8fa;
}

.legal-content {
    max-width: 820px;
    margin: 52px auto;
    padding: clamp(28px, 6vw, 58px);
    border: 1px solid var(--line);
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 12px 36px rgba(27, 38, 59, 0.07);
}

.legal-content h1 {
    margin-bottom: 10px;
    font-size: clamp(2rem, 4vw, 3rem);
}

.legal-content h2 {
    margin-top: 34px;
    font-size: 1.2rem;
}

.legal-content p,
.legal-content li {
    color: #4d5b72;
}

.legal-content ul {
    padding-left: 1.3rem;
}

.legal-meta {
    color: var(--muted);
    font-size: 0.92rem;
}

.content-page {
    min-height: 100vh;
    background: var(--paper);
}

.page-hero {
    overflow: hidden;
    position: relative;
    padding: 98px 0 86px;
    background:
        radial-gradient(circle at 84% 21%, rgba(239, 124, 61, 0.20), transparent 26%),
        radial-gradient(circle at 71% 80%, rgba(44, 124, 123, 0.12), transparent 31%),
        linear-gradient(120deg, #fffaf2, #f4fafb);
}

.page-hero::after {
    position: absolute;
    right: -122px;
    bottom: -205px;
    width: 390px;
    height: 390px;
    border: 42px solid rgba(44, 124, 123, 0.08);
    border-radius: 50%;
    content: "";
}

.page-hero-product {
    background:
        radial-gradient(circle at 83% 17%, rgba(239, 124, 61, 0.28), transparent 26%),
        radial-gradient(circle at 20% 80%, rgba(44, 124, 123, 0.12), transparent 33%),
        linear-gradient(120deg, #fff7ec, #eef8f7);
}

.page-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
    align-items: center;
    gap: 66px;
}

.page-hero h1 {
    margin-bottom: 19px;
    font-size: clamp(2.45rem, 5vw, 4.15rem);
}

.page-hero-copy {
    max-width: 690px;
    margin-bottom: 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.page-hero-card {
    padding: 29px;
    border: 1px solid rgba(255, 255, 255, 0.80);
    border-radius: 24px;
    color: #fff;
    background: linear-gradient(145deg, #285e68, #1f3b4d);
    box-shadow: var(--shadow);
}

.page-hero-card-label {
    display: block;
    margin-bottom: 13px;
    color: #f7bc87;
    font-size: 0.76rem;
    font-weight: 750;
    letter-spacing: 0.12em;
}

.page-hero-card h2 {
    margin: 0 0 15px;
    font-size: 1.5rem;
    line-height: 1.32;
}

.page-hero-card p {
    margin-bottom: 0;
    color: rgba(255, 255, 255, 0.76);
}

.page-hero-card-list {
    display: grid;
    gap: 11px;
    margin: 19px 0 0;
    padding: 0;
    list-style: none;
}

.page-hero-card-list li {
    padding-top: 11px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.94rem;
}

.page-section {
    padding: 88px 0;
}

.page-section-alt {
    background: #f4f8f8;
}

.page-section-warm {
    background: #fff7ef;
}

.page-heading {
    max-width: 710px;
    margin-bottom: 40px;
}

.page-heading h2 {
    margin-bottom: 13px;
    font-size: clamp(1.85rem, 3vw, 2.65rem);
    line-height: 1.22;
    letter-spacing: -0.025em;
}

.page-heading p {
    margin-bottom: 0;
    color: var(--muted);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

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

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

.feature-card {
    min-height: 210px;
    padding: 27px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.feature-card h3 {
    margin: 19px 0 10px;
    font-size: 1.1rem;
}

.feature-card p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.feature-icon {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border-radius: 12px;
    color: var(--orange-dark);
    background: #fff0e7;
    font-size: 1rem;
    font-weight: 800;
}

.feature-card-teal .feature-icon {
    color: var(--teal);
    background: #e5f2f1;
}

.feature-card-dark {
    border-color: transparent;
    color: #fff;
    background: #1f3b4d;
}

.feature-card-dark .feature-icon {
    color: #f5ad67;
    background: rgba(255, 255, 255, 0.12);
}

.feature-card-dark p {
    color: rgba(255, 255, 255, 0.74);
}

.feature-card-compact {
    min-height: 0;
}

.feature-card-compact h3 {
    margin-top: 0;
}

.story-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
    align-items: center;
    gap: 54px;
}

.story-copy p {
    max-width: 650px;
    color: var(--muted);
}

.story-copy p:last-child {
    margin-bottom: 0;
}

.info-panel {
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 16px 38px rgba(27, 38, 59, 0.06);
}

.info-panel h3 {
    margin-bottom: 18px;
    font-size: 1.18rem;
}

.info-panel-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.info-panel-list li {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 11px;
    padding: 13px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.info-panel-list li:first-child {
    border-top: 0;
    padding-top: 0;
}

.info-panel-list strong {
    display: block;
    margin-bottom: 2px;
    color: var(--ink);
    font-size: 0.95rem;
}

.list-dot {
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    border-radius: 50%;
    color: var(--orange-dark);
    background: #fff0e7;
    font-size: 0.78rem;
    font-weight: 800;
}

.learning-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 20px;
    list-style: none;
    background: #fff;
}

.learning-flow li {
    min-height: 187px;
    padding: 25px;
    border-right: 1px solid var(--line);
}

.learning-flow li:last-child {
    border-right: 0;
}

.learning-flow span {
    color: var(--orange-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.learning-flow h3 {
    margin: 14px 0 8px;
    font-size: 1.05rem;
}

.learning-flow p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.product-preview {
    position: relative;
    min-height: 340px;
    overflow: hidden;
    border-radius: 24px;
    background: linear-gradient(145deg, #285e68, #e98746);
}

.product-preview::before,
.product-preview::after {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    content: "";
}

.product-preview::before {
    top: -115px;
    right: -80px;
    width: 310px;
    height: 310px;
}

.product-preview::after {
    bottom: -95px;
    left: -65px;
    width: 245px;
    height: 245px;
}

.preview-card {
    position: absolute;
    z-index: 1;
    top: 45px;
    right: 16%;
    width: min(265px, 72%);
    padding: 25px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 22px 42px rgba(12, 32, 41, 0.26);
    transform: rotate(4deg);
}

.preview-card small {
    color: var(--teal);
    font-weight: 800;
    letter-spacing: 0.05em;
}

.preview-card strong {
    display: block;
    margin: 12px 0 4px;
    font-size: 2.15rem;
    letter-spacing: -0.04em;
}

.preview-card p {
    margin-bottom: 0;
    color: var(--muted);
}

.preview-mini-card {
    position: absolute;
    z-index: 1;
    bottom: 38px;
    left: 12%;
    padding: 13px 16px;
    border: 1px solid rgba(255, 255, 255, 0.46);
    border-radius: 14px;
    color: #fff;
    background: rgba(31, 59, 77, 0.50);
    backdrop-filter: blur(6px);
    font-size: 0.89rem;
}

.summary-list-wide {
    max-width: 820px;
}

.article-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
}

.support-board {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.94fr);
    overflow: hidden;
    border-radius: 24px;
    color: #fff;
    background: #1f3b4d;
}

.support-board-copy {
    padding: 44px;
}

.support-board-copy h2 {
    margin: 12px 0 14px;
    font-size: 2rem;
}

.support-board-copy p {
    color: rgba(255, 255, 255, 0.76);
}

.support-board-side {
    padding: 36px;
    background: rgba(255, 255, 255, 0.08);
}

.support-board-side a {
    color: #fff;
}

.support-board-side .info-panel-list li {
    border-color: rgba(255, 255, 255, 0.14);
    color: rgba(255, 255, 255, 0.70);
}

.support-board-side .info-panel-list strong {
    color: #fff;
}

.support-board-side .list-dot {
    color: #f5ad67;
    background: rgba(255, 255, 255, 0.12);
}

.statement-card {
    padding: 32px;
    border: 1px solid #f2d8c6;
    border-radius: 20px;
    background: #fffaf5;
}

.statement-card h3 {
    margin-bottom: 13px;
}

.statement-card p {
    max-width: 800px;
    margin-bottom: 0;
    color: var(--muted);
}

.support-callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.support-callout h2 {
    margin-bottom: 10px;
    font-size: clamp(1.7rem, 3vw, 2.45rem);
}

.support-callout p {
    max-width: 650px;
    margin-bottom: 0;
    color: var(--muted);
}

.support-actions {
    display: flex;
    flex: none;
    flex-wrap: wrap;
    gap: 12px;
}

.faq-list {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.faq-list details {
    padding: 0 24px;
    border-bottom: 1px solid var(--line);
}

.faq-list details:last-child {
    border-bottom: 0;
}

.faq-list summary {
    padding: 19px 28px 19px 0;
    cursor: pointer;
    font-weight: 700;
}

.faq-list p {
    margin: 0 0 20px;
    color: var(--muted);
}

@media (max-width: 780px) {
    .header-inner {
        min-height: 64px;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 76px 0 66px;
    }

    .hero-grid,
    .product-panel,
    .contact-grid,
    .split-layout,
    .page-hero-grid,
    .story-grid,
    .support-board {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .hero-card {
        max-width: 460px;
    }

    .section {
        padding: 66px 0;
    }

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

    .feature-grid,
    .feature-grid-2,
    .feature-grid-4,
    .learning-flow {
        grid-template-columns: 1fr;
    }

    .page-hero {
        padding: 70px 0 56px;
    }

    .article-layout {
        padding-top: 50px;
        padding-bottom: 66px;
    }

    .article-layout section {
        margin-bottom: 42px;
    }

    .page-section {
        padding: 66px 0;
    }

    .page-hero-card {
        max-width: 480px;
    }

    .learning-flow li {
        min-height: 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .learning-flow li:last-child {
        border-bottom: 0;
    }

    .support-board-copy,
    .support-board-side {
        padding: 32px 28px;
    }

    .product-preview {
        min-height: 290px;
    }

    .support-callout {
        display: block;
    }

    .support-actions {
        margin-top: 26px;
    }

    .product-copy {
        padding: 34px 28px 15px;
    }

    .product-art {
        min-height: 240px;
    }

    .footer-inner {
        display: block;
    }

    .footer-inner p {
        margin: 0 0 8px;
    }

    .footer-inner-rich nav {
        justify-content: flex-start;
    }
}