/* 开云蓝白响应式主题 */
:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 50px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-h: 78px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 8%, rgba(53, 215, 255, 0.12), transparent 28%),
        linear-gradient(180deg, #FFFFFF 0, var(--bg) 16rem, var(--bg) 100%);
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
}

body.drawer-open {
    overflow: hidden;
}

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

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 2000;
    transform: translateY(-160%);
    padding: 10px 16px;
    color: #fff;
    background: var(--deep-blue);
    border-radius: 10px;
}

.skip-link:focus {
    transform: translateY(0);
}

.section-shell {
    width: min(100% - 32px, 1240px);
    margin-inline: auto;
}

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 30px rgba(21, 90, 157, 0.06);
    backdrop-filter: blur(18px);
}

.header-inner {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 28px);
}

.brand-logo,
.drawer-logo {
    flex: 0 0 auto;
}

.brand-logo img,
.drawer-logo img,
.footer-brand img {
    width: auto;
    height: 46px;
    object-fit: contain;
}

.desktop-nav {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(6px, 0.72vw, 14px);
    white-space: nowrap;
}

.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    padding: 9px clamp(4px, 0.45vw, 8px);
    color: var(--text);
    font-size: clamp(12px, 0.84vw, 14px);
    font-weight: 650;
    transition: color .2s ease;
}

.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 3px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #35D7FF, #1688D8);
    transition: left .2s ease, right .2s ease;
}

.desktop-nav a:hover,
.desktop-nav a.is-active {
    color: var(--primary-strong);
}

.desktop-nav a:hover::after,
.desktop-nav a.is-active::after {
    left: 6px;
    right: 6px;
}

.header-actions {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

.main-btn {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    border: 0;
    border-radius: 999px;
    box-shadow: 0 10px 24px rgba(22, 136, 216, 0.22);
    font-weight: 750;
    white-space: nowrap;
    transition: transform .2s ease, box-shadow .2s ease;
}

.main-btn:hover,
.main-btn:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(22, 136, 216, 0.28);
}

.menu-toggle {
    display: none;
    width: 46px;
    height: 46px;
    padding: 11px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    background: var(--deep-blue);
    border-radius: 999px;
}

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1090;
    background: rgba(7, 58, 104, 0.46);
    backdrop-filter: blur(4px);
}

.mobile-drawer {
    position: fixed;
    z-index: 1100;
    top: 0;
    right: 0;
    width: min(88vw, 380px);
    height: 100dvh;
    padding: 18px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -20px 0 60px rgba(7, 58, 104, 0.2);
    transform: translateX(105%);
    transition: transform .28s ease;
}

.mobile-drawer.is-open {
    transform: translateX(0);
}

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.drawer-close {
    width: 42px;
    height: 42px;
    color: var(--deep-blue);
    background: var(--surface-soft);
    border: 0;
    border-radius: 50%;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.mobile-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding: 20px 0;
}

.mobile-nav a {
    padding: 11px 12px;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-align: center;
    font-weight: 650;
}

.mobile-nav a.is-active {
    color: var(--primary-strong);
    background: var(--surface-soft);
}

.drawer-register {
    width: 100%;
}

main {
    min-height: 70vh;
    padding-top: var(--header-h);
}

.hero-carousel-wrap {
    padding: 26px 0 6px;
}

.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
    aspect-ratio: 1920 / 620;
    min-height: 240px;
    overflow: hidden;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.carousel-track,
.carousel-slide {
    position: absolute;
    inset: 0;
}

.carousel-slide {
    margin: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity .55s ease;
}

.carousel-slide.is-active {
    opacity: 1;
    pointer-events: auto;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.carousel-control {
    position: absolute;
    z-index: 3;
    top: 50%;
    width: 46px;
    height: 46px;
    transform: translateY(-50%);
    color: var(--deep-blue);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border);
    border-radius: 50%;
    box-shadow: 0 8px 22px rgba(7, 58, 104, 0.14);
    cursor: pointer;
    font-size: 24px;
}

.carousel-control:hover {
    background: #fff;
}

.carousel-control--prev {
    left: 18px;
}

.carousel-control--next {
    right: 18px;
}

.carousel-dots {
    position: absolute;
    z-index: 3;
    left: 50%;
    bottom: 16px;
    display: flex;
    gap: 8px;
    transform: translateX(-50%);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(22, 136, 216, 0.48);
    border-radius: 50%;
    cursor: pointer;
    transition: width .2s ease, background .2s ease;
}

.carousel-dot.is-active {
    width: 28px;
    background: var(--primary);
    border-radius: 999px;
}

.home-intro,
.page-intro {
    padding: clamp(54px, 7vw, 92px) 0 clamp(42px, 5vw, 72px);
}

.home-intro__panel,
.page-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr);
    align-items: center;
    gap: clamp(28px, 5vw, 70px);
}

.home-intro__panel {
    padding: clamp(30px, 5vw, 58px);
    background: linear-gradient(135deg, rgba(255,255,255,.98), rgba(232,247,255,.9));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.page-intro__copy h1,
.home-intro h1 {
    max-width: 820px;
    margin: 8px 0 18px;
    color: var(--deep-blue);
    font-size: clamp(34px, 5vw, 62px);
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.page-lead,
.home-lead {
    margin: 0;
    color: var(--muted);
    font-size: clamp(17px, 2vw, 20px);
    line-height: 1.9;
}

.intro-actions,
.inline-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-top: 24px;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-strong);
    font-weight: 750;
}

.text-link span {
    transition: transform .2s ease;
}

.text-link:hover span {
    transform: translateX(4px);
}

.media-frame {
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}

.media-frame img {
    width: 100%;
    height: 100%;
    min-height: 260px;
    object-fit: contain;
    object-position: center;
}

.page-intro__media {
    min-height: 350px;
}

.content-section {
    padding: clamp(54px, 7vw, 92px) 0;
}

.content-section.soft {
    background: linear-gradient(180deg, rgba(232, 247, 255, 0.86), rgba(244, 251, 255, 0.4));
    border-block: 1px solid rgba(16,174,234,.1);
}

.section-heading {
    max-width: 800px;
    margin-bottom: clamp(28px, 4vw, 46px);
}

.section-heading h2,
.compliance-panel h2 {
    margin: 6px 0 12px;
    color: var(--deep-blue);
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.25;
}

.section-heading > p:last-child {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

.split-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, .9fr);
    align-items: center;
    gap: clamp(28px, 5vw, 64px);
}

.split-content--reverse .prose-stack {
    order: 2;
}

.split-content--reverse .content-media {
    order: 1;
}

.prose-stack {
    display: grid;
    gap: 16px;
}

.prose-stack--wide {
    max-width: 980px;
}

.prose-stack p {
    margin: 0;
    color: var(--text);
    font-size: 16px;
}

.content-media {
    min-height: 320px;
}

.card-grid,
.quick-grid,
.review-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-top: 32px;
}

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

.info-card,
.quick-card,
.review-card,
.faq-item {
    margin: 0;
    padding: 24px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
}

.info-card,
.quick-card,
.review-card {
    transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.info-card:hover,
.quick-card:hover,
.review-card:hover {
    transform: translateY(-5px);
    border-color: rgba(16,174,234,.34);
    box-shadow: var(--shadow);
}

.info-card h3,
.quick-card h3 {
    margin: 4px 0 10px;
    color: var(--deep-blue);
    font-size: 20px;
    line-height: 1.4;
}

.info-card p,
.quick-card p,
.review-card blockquote {
    margin: 0 0 16px;
    color: var(--muted);
}

.card-tag {
    display: inline-flex;
    padding: 5px 10px;
    color: var(--primary-strong);
    background: var(--surface-soft);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

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

.quick-card {
    min-height: 220px;
    display: flex;
    flex-direction: column;
}

.quick-card .text-link {
    margin-top: auto;
}

.review-card {
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.review-card blockquote {
    font-size: 16px;
}

.review-card figcaption {
    color: var(--primary-strong);
    font-weight: 750;
}

.compliance-section {
    padding-top: 24px;
}

.compliance-panel {
    display: grid;
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: 36px;
    padding: clamp(28px, 5vw, 52px);
    color: var(--text);
    background: linear-gradient(135deg, #FFFFFF, #E8F7FF);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.compliance-copy {
    display: grid;
    gap: 12px;
}

.compliance-copy p {
    margin: 0;
}

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

.faq-item {
    padding: 0;
    overflow: hidden;
}

.faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 21px 24px;
    color: var(--deep-blue);
    font-weight: 800;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item p {
    margin: 0;
    padding: 0 24px 24px;
    color: var(--muted);
}

.cta-band {
    padding: 0 0 clamp(58px, 7vw, 96px);
}

.cta-band__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: clamp(28px, 5vw, 52px);
    color: #fff;
    background: linear-gradient(135deg, #10AEEA, #155A9D);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 60px rgba(21,90,157,.22);
}

.cta-band h2 {
    margin: 0 0 8px;
    font-size: clamp(26px, 4vw, 40px);
    line-height: 1.25;
}

.cta-band p {
    margin: 0;
    color: rgba(255,255,255,.86);
}

.cta-band .main-btn {
    color: var(--deep-blue);
    background: #fff;
    box-shadow: none;
}

.site-footer {
    color: var(--footer-text);
    background: var(--footer);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(260px, .8fr) minmax(0, 1.2fr);
    gap: clamp(36px, 7vw, 90px);
    padding-top: 58px;
    padding-bottom: 42px;
}

.footer-brand p {
    max-width: 470px;
    margin: 18px 0 0;
    color: rgba(234,248,255,.78);
}

.footer-brand img {
    filter: brightness(0) invert(1);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}

.footer-links h2 {
    margin: 0 0 14px;
    color: #fff;
    font-size: 16px;
}

.footer-links a {
    display: block;
    margin: 8px 0;
    color: rgba(234,248,255,.78);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    padding-top: 22px;
    padding-bottom: 28px;
    border-top: 1px solid rgba(234,248,255,.14);
}

.footer-bottom p {
    margin: 0;
    color: rgba(234,248,255,.72);
    font-size: 13px;
}

@media (max-width: 1180px) {
    .desktop-nav {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .header-inner {
        justify-content: space-between;
    }
}

@media (max-width: 960px) {
    .home-intro__panel,
    .page-intro,
    .split-content,
    .compliance-panel,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .split-content--reverse .prose-stack,
    .split-content--reverse .content-media {
        order: initial;
    }

    .page-intro__media,
    .content-media {
        min-height: 280px;
    }

    .quick-grid,
    .card-grid,
    .card-grid--three,
    .review-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        gap: 40px;
    }
}

@media (max-width: 720px) {
    :root {
        --header-h: 68px;
        --radius-lg: 22px;
    }

    .section-shell,
    .header-inner,
    .carousel {
        width: min(100% - 24px, 100%);
    }

    .brand-logo img {
        height: 39px;
    }

    .header-register {
        min-height: 40px;
        padding: 8px 17px;
    }

    .menu-toggle {
        width: 42px;
        height: 42px;
        padding: 9px;
    }

    .hero-carousel-wrap {
        padding-top: 14px;
    }

    .carousel {
        aspect-ratio: 16 / 9;
        min-height: 0;
        border-radius: 18px;
    }

    .carousel-control {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .carousel-control--prev {
        left: 10px;
    }

    .carousel-control--next {
        right: 10px;
    }

    .carousel-dots {
        bottom: 10px;
    }

    .home-intro,
    .page-intro,
    .content-section {
        padding-top: 48px;
        padding-bottom: 48px;
    }

    .home-intro__panel {
        padding: 26px;
    }

    .page-intro__copy h1,
    .home-intro h1 {
        font-size: clamp(32px, 10vw, 46px);
    }

    .quick-grid,
    .card-grid,
    .card-grid--three,
    .review-grid,
    .footer-links {
        grid-template-columns: 1fr;
    }

    .quick-card {
        min-height: auto;
    }

    .media-frame img {
        min-height: 220px;
    }

    .cta-band__inner,
    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .cta-band__inner .main-btn {
        width: 100%;
    }
}

@media (max-width: 420px) {
    .header-inner {
        gap: 8px;
    }

    .brand-logo img {
        height: 36px;
        max-width: 138px;
    }

    .header-actions {
        gap: 7px;
    }

    .header-register {
        padding-inline: 14px;
    }

    .mobile-nav {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}