:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --title: #11AEEA;
    --blue: #1688D8;
    --deep-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --shadow: 0 18px 45px rgba(22, 136, 216, 0.12);
    --shadow-soft: 0 10px 28px rgba(21, 90, 157, 0.09);
    --radius-lg: 30px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --header-height: 76px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

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;
}

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

h1,
h2,
h3 {
    line-height: 1.28;
}

h1 {
    margin-bottom: 22px;
    color: var(--deep-blue);
    font-size: clamp(2rem, 5vw, 4.3rem);
    letter-spacing: -0.045em;
}

h2 {
    margin-bottom: 16px;
    color: var(--deep-blue);
    font-size: clamp(1.65rem, 3vw, 2.65rem);
    letter-spacing: -0.03em;
}

h3 {
    margin-bottom: 10px;
    color: var(--deep-blue);
    font-size: clamp(1.08rem, 2vw, 1.35rem);
}

p {
    color: var(--muted);
}

.content-wrap,
.header-inner {
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 9999;
    transform: translateY(-160%);
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--deep-blue);
    color: #fff;
}

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

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: var(--header-height);
    border-bottom: 1px solid transparent;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(18px);
    transition: box-shadow .25s ease, border-color .25s ease;
}

.site-header.is-scrolled {
    border-color: var(--border);
    box-shadow: 0 12px 30px rgba(21, 90, 157, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.4vw, 22px);
    height: 100%;
}

.brand-logo,
.drawer-logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
}

.brand-logo img {
    width: clamp(102px, 10vw, 140px);
    max-height: 46px;
    object-fit: contain;
}

.desktop-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-width: 0;
    gap: clamp(5px, .72vw, 12px);
}

.desktop-nav a {
    position: relative;
    flex: 0 1 auto;
    white-space: nowrap;
    padding: 10px clamp(3px, .35vw, 8px);
    color: var(--text);
    font-size: clamp(.75rem, .82vw, .9rem);
    font-weight: 700;
    transition: color .2s ease;
}

.desktop-nav a::after {
    content: "";
    position: absolute;
    right: 25%;
    bottom: 3px;
    left: 25%;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient);
    opacity: 0;
    transform: scaleX(.5);
    transition: opacity .2s ease, transform .2s ease;
}

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

.desktop-nav a:hover::after,
.desktop-nav a.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

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

.main-btn,
.secondary-btn,
.text-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border-radius: 999px;
    padding: 0 22px;
    font-weight: 800;
    line-height: 1;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.main-btn {
    border: 0;
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 10px 24px rgba(22, 136, 216, 0.23);
}

.main-btn:hover,
.secondary-btn:hover,
.text-btn:hover {
    transform: translateY(-2px);
}

.main-btn:hover {
    box-shadow: 0 15px 30px rgba(22, 136, 216, 0.3);
}

.secondary-btn {
    border: 1px solid var(--border);
    background: #fff;
    color: var(--blue);
}

.text-btn {
    border: 1px solid rgba(22, 136, 216, .26);
    background: rgba(255,255,255,.76);
    color: var(--deep-blue);
}

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

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 4px auto;
    border-radius: 999px;
    background: var(--deep-blue);
}

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1100;
    background: rgba(7, 58, 104, .38);
    opacity: 0;
    transition: opacity .25s ease;
}

.drawer-overlay.is-visible {
    opacity: 1;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(88vw, 390px);
    height: 100dvh;
    overflow-y: auto;
    transform: translateX(105%);
    border-left: 1px solid var(--border);
    background: #fff;
    box-shadow: -24px 0 55px rgba(7, 58, 104, .16);
    transition: transform .28s ease;
}

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

.drawer-head {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,.96);
}

.drawer-logo img,
.footer-logo img {
    width: 128px;
    max-height: 46px;
    object-fit: contain;
}

.drawer-close {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-soft);
    color: var(--deep-blue);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.mobile-nav {
    display: grid;
    gap: 8px;
    padding: 18px 20px 36px;
}

.mobile-nav a {
    padding: 14px 16px;
    border: 1px solid transparent;
    border-radius: 14px;
    color: var(--text);
    font-weight: 700;
}

.mobile-nav a:hover,
.mobile-nav a.is-active {
    border-color: var(--border);
    background: var(--surface-soft);
    color: var(--blue);
}

.site-main {
    padding-top: var(--header-height);
}

.carousel-section {
    padding: 26px 0 14px;
}

.carousel-shell {
    position: relative;
    overflow: hidden;
    min-height: clamp(210px, 42vw, 620px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #e8f7ff, #fff);
    box-shadow: var(--shadow);
}

.carousel-track {
    position: relative;
    min-height: inherit;
}

.carousel-slide {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    opacity: 0;
    transition: opacity .55s ease;
}

.carousel-slide.is-active {
    z-index: 1;
    opacity: 1;
}

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

.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 3;
    display: grid;
    place-items: center;
    width: clamp(42px, 5vw, 56px);
    height: clamp(42px, 5vw, 56px);
    transform: translateY(-50%);
    border: 1px solid rgba(255,255,255,.76);
    border-radius: 50%;
    background: rgba(7, 58, 104, .42);
    color: #fff;
    font-size: 32px;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.carousel-arrow:hover {
    background: rgba(7, 58, 104, .62);
}

.carousel-arrow--prev { left: clamp(12px, 2vw, 24px); }
.carousel-arrow--next { right: clamp(12px, 2vw, 24px); }

.carousel-dots {
    position: absolute;
    right: 0;
    bottom: 18px;
    left: 0;
    z-index: 3;
    display: flex;
    justify-content: center;
    gap: 8px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(255,255,255,.72);
    box-shadow: 0 2px 8px rgba(7, 58, 104, .18);
    cursor: pointer;
    transition: width .2s ease, background .2s ease;
}

.carousel-dot.is-active {
    width: 30px;
    background: #fff;
}

.home-intro,
.page-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(64px, 9vw, 118px) 0;
}

.home-intro::before,
.page-hero::before {
    content: "";
    position: absolute;
    top: -170px;
    right: -120px;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(53,215,255,.23), rgba(53,215,255,0) 70%);
    pointer-events: none;
}

.home-intro__grid,
.page-hero__inner,
.split-layout {
    display: grid;
    align-items: center;
    gap: clamp(34px, 6vw, 82px);
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
}

.home-intro__copy p,
.page-hero__copy p {
    max-width: 740px;
    font-size: clamp(1rem, 1.6vw, 1.18rem);
}

.hero-actions,
.inline-links,
.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.eyebrow,
.card-label {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    margin-bottom: 14px;
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(232, 247, 255, .86);
    color: var(--blue);
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .06em;
}

.page-hero__media,
.content-media {
    margin: 0;
    overflow: hidden;
    min-height: 320px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #e8f7ff, #fff);
    box-shadow: var(--shadow);
}

.page-hero__media img,
.content-media img {
    width: 100%;
    height: 100%;
    min-height: inherit;
    object-fit: contain;
}

.section-block {
    padding: clamp(64px, 8vw, 104px) 0;
}

.section-soft {
    background: linear-gradient(180deg, rgba(232,247,255,.7), rgba(244,251,255,.9));
}

.section-heading {
    max-width: 820px;
    margin-bottom: clamp(28px, 4vw, 48px);
}

.section-heading p {
    margin-bottom: 0;
    font-size: 1.04rem;
}

.info-grid,
.review-grid,
.quick-grid,
.product-grid,
.faq-grid,
.stats-grid {
    display: grid;
    gap: clamp(16px, 2vw, 26px);
}

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

.quick-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

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

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

.info-card,
.review-card,
.quick-card,
.product-card,
.stat-card,
.faq-card,
.content-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.info-card,
.review-card,
.quick-card,
.stat-card,
.faq-card,
.content-card {
    padding: clamp(22px, 3vw, 32px);
}

.info-card::before,
.quick-card::before,
.product-card::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 3px;
    background: var(--gradient);
    opacity: .72;
}

.info-card p,
.quick-card p,
.product-card p,
.review-card p,
.faq-card p {
    margin-bottom: 0;
}

.text-link,
.inline-links a {
    display: inline-flex;
    margin-top: 18px;
    color: var(--blue);
    font-weight: 800;
}

.text-link::after {
    content: "→";
    margin-left: 6px;
    transition: transform .2s ease;
}

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

.product-card {
    display: flex;
    flex-direction: column;
}

.product-card__media {
    display: grid;
    place-items: center;
    min-height: 230px;
    padding: 18px;
    background: linear-gradient(145deg, #f7fcff, #e8f7ff);
}

.product-card__media img {
    width: 100%;
    height: 230px;
    object-fit: contain;
}

.product-card__body {
    flex: 1;
    padding: 26px;
}

.split-layout--reverse .content-media {
    order: 2;
}

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

.feature-list,
.check-list {
    display: grid;
    gap: 14px;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

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

.feature-list li::before,
.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 1px;
    display: grid;
    place-items: center;
    width: 21px;
    height: 21px;
    border-radius: 50%;
    background: var(--surface-soft);
    color: var(--blue);
    font-size: .78rem;
    font-weight: 900;
}

.step-list {
    display: grid;
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: steps;
}

.step-list li {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.step-list li > span {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: var(--gradient);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 900;
}

.step-list h3 {
    margin-bottom: 6px;
}

.step-list p {
    margin-bottom: 0;
}

.notice-panel,
.compliance-card,
.cta-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: clamp(28px, 5vw, 56px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #fff 0%, #e8f7ff 100%);
    box-shadow: var(--shadow);
}

.notice-panel p,
.compliance-card p,
.cta-panel p {
    max-width: 900px;
    margin-bottom: 0;
}

.compliance-section {
    padding-top: 22px;
}

.compliance-card {
    display: block;
}

.review-card {
    min-height: 230px;
}

.review-mark {
    height: 42px;
    color: var(--title);
    font-family: Georgia, serif;
    font-size: 64px;
    line-height: .8;
}

.review-card strong {
    display: block;
    margin-top: 22px;
    color: var(--deep-blue);
}

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

.stat-card strong {
    display: block;
    margin-bottom: 6px;
    color: var(--title);
    font-size: clamp(1.6rem, 3vw, 2.35rem);
}

.faq-card,
.faq-list details {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

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

.faq-list details {
    overflow: hidden;
}

.faq-list summary {
    position: relative;
    padding: 22px 58px 22px 24px;
    color: var(--deep-blue);
    font-weight: 800;
    cursor: pointer;
    list-style: none;
}

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

.faq-list summary::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 24px;
    transform: translateY(-50%);
    color: var(--blue);
    font-size: 26px;
    font-weight: 400;
}

.faq-list details[open] summary::after {
    content: "−";
}

.faq-list details p {
    margin: 0;
    padding: 0 24px 24px;
}

.badge-row span {
    padding: 7px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--deep-blue);
    font-size: .88rem;
    font-weight: 700;
}

.site-footer {
    margin-top: clamp(56px, 8vw, 100px);
    padding: 64px 0 24px;
    background: var(--footer);
    color: var(--footer-text);
}

.footer-grid {
    display: grid;
    gap: 38px;
    grid-template-columns: minmax(260px, 1.55fr) repeat(3, minmax(150px, .7fr));
}

.site-footer h2 {
    margin-bottom: 18px;
    color: #fff;
    font-size: 1rem;
}

.site-footer p,
.site-footer a {
    color: rgba(234, 248, 255, .8);
}

.site-footer a {
    display: block;
    width: fit-content;
    margin-bottom: 10px;
}

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

.footer-brand p {
    max-width: 500px;
    margin: 20px 0 0;
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 44px;
    padding-top: 24px;
    border-top: 1px solid rgba(234,248,255,.14);
}

.footer-bottom p {
    margin: 0;
    font-size: .9rem;
}

@media (max-width: 1179px) {
    .desktop-nav {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

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

    .brand-logo {
        margin-right: auto;
    }

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

@media (max-width: 900px) {
    :root {
        --header-height: 70px;
    }

    .home-intro__grid,
    .page-hero__inner,
    .split-layout {
        grid-template-columns: 1fr;
    }

    .page-hero__media,
    .content-media {
        min-height: 260px;
    }

    .split-layout--reverse .content-media {
        order: initial;
    }

    .info-grid,
    .product-grid,
    .review-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

    .footer-brand {
        grid-column: 1 / -1;
    }

    .notice-panel,
    .cta-panel {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 680px) {
    .content-wrap {
        width: min(100% - 24px, 1360px);
    }

    .brand-logo img {
        width: 104px;
    }

    .header-register {
        min-height: 42px;
        padding-inline: 18px;
    }

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

    .carousel-section {
        padding-top: 14px;
    }

    .carousel-shell {
        min-height: clamp(190px, 58vw, 330px);
        border-radius: 20px;
    }

    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 26px;
    }

    .carousel-dots {
        bottom: 12px;
    }

    .home-intro,
    .page-hero,
    .section-block {
        padding-block: 56px;
    }

    .page-hero__media,
    .content-media {
        min-height: 220px;
        border-radius: 22px;
    }

    .quick-grid,
    .info-grid,
    .product-grid,
    .review-grid,
    .faq-grid,
    .stats-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .step-list li {
        grid-template-columns: 44px minmax(0, 1fr);
        padding: 20px;
    }

    .step-list li > span {
        width: 42px;
        height: 42px;
        border-radius: 13px;
    }

    .notice-panel,
    .compliance-card,
    .cta-panel {
        padding: 26px 22px;
        border-radius: 22px;
    }

    .footer-brand {
        grid-column: auto;
    }

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

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