:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-strong: #1688D8;
    --deep: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --footer: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 50px rgba(15, 111, 174, 0.12);
    --shadow-soft: 0 10px 28px rgba(15, 111, 174, 0.09);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --header-height: 76px;
}

* {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    padding-top: var(--header-height);
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
    font-size: 16px;
    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,
input,
textarea,
select {
    font: inherit;
}

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

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

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

.container {
    width: min(100% - 32px, 1200px);
    margin-inline: auto;
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: var(--header-height);
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 8px 26px rgba(15, 111, 174, 0.07);
    backdrop-filter: blur(14px);
}

.header-container {
    width: min(100% - 32px, 1360px);
    height: 100%;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.5vw, 26px);
}

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

.site-logo img {
    width: clamp(112px, 10vw, 148px);
    max-height: 50px;
    object-fit: contain;
}

.desktop-nav {
    min-width: 0;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(5px, 0.65vw, 12px);
    overflow: hidden;
}

.desktop-nav a {
    flex: 0 0 auto;
    white-space: nowrap;
    padding: 9px clamp(5px, 0.4vw, 8px);
    border-radius: 10px;
    color: var(--text);
    font-size: clamp(12px, 0.88vw, 14px);
    font-weight: 700;
    transition: .2s ease;
}

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

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

.main-btn,
.secondary-btn,
.text-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border-radius: 999px;
    font-weight: 800;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.main-btn {
    padding: 10px 22px;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    color: #fff;
    box-shadow: 0 10px 24px rgba(22, 136, 216, .25);
    white-space: nowrap;
}

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

.secondary-btn {
    padding: 10px 22px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--primary-strong);
}

.text-link {
    min-height: auto;
    justify-content: flex-start;
    border-radius: 0;
    color: var(--primary-strong);
}

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

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

.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    margin: 5px 0;
    border-radius: 2px;
    background: var(--deep);
}

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 1100;
    opacity: 0;
    background: rgba(7, 58, 104, .42);
    transition: opacity .25s ease;
}

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

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 1200;
    width: min(86vw, 390px);
    height: 100dvh;
    transform: translateX(105%);
    padding: 20px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -18px 0 60px rgba(7, 58, 104, .18);
    transition: transform .28s ease;
}

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

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

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

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

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

.mobile-nav a {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    color: var(--text);
    font-weight: 700;
}

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

.drawer-register {
    width: 100%;
}

main {
    min-height: 60vh;
}

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

.section-tight {
    padding: clamp(38px, 5vw, 64px) 0;
}

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

.section-heading {
    max-width: 760px;
    margin: 0 auto clamp(28px, 4vw, 48px);
    text-align: center;
}

.section-heading.align-left {
    margin-inline: 0;
    text-align: left;
}

.section-heading.compact {
    margin-bottom: 28px;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 10px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .16em;
}

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

h1,
h2,
h3 {
    color: var(--deep);
    line-height: 1.28;
}

h1 {
    margin-bottom: 18px;
    font-size: clamp(34px, 5vw, 60px);
    letter-spacing: -.03em;
}

h2 {
    margin-bottom: 14px;
    font-size: clamp(27px, 3.5vw, 42px);
}

h3 {
    margin-bottom: 10px;
    font-size: clamp(18px, 2vw, 23px);
}

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

.lead {
    font-size: clamp(17px, 2vw, 21px);
    line-height: 1.85;
}

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

.home-carousel-section {
    padding: 24px 0 0;
}

.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin-inline: auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: #dff5ff;
    box-shadow: var(--shadow);
}

.carousel-track {
    display: flex;
    transition: transform .55s cubic-bezier(.22, .7, .25, 1);
}

.carousel-slide {
    flex: 0 0 100%;
    min-width: 0;
    background: #e9f8ff;
}

.carousel-slide img {
    width: 100%;
    height: clamp(230px, 40vw, 560px);
    object-fit: contain;
}

.carousel-control {
    position: absolute;
    top: 50%;
    z-index: 2;
    width: clamp(42px, 5vw, 54px);
    height: clamp(42px, 5vw, 54px);
    transform: translateY(-50%);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 50%;
    background: rgba(7, 58, 104, .56);
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    backdrop-filter: blur(8px);
}

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

.carousel-dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    z-index: 2;
    display: flex;
    gap: 8px;
    transform: translateX(-50%);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(255,255,255,.68);
    cursor: pointer;
    transition: width .2s ease, background .2s ease;
}

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

.intro-grid,
.page-hero-grid,
.split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
    gap: clamp(28px, 5vw, 68px);
    align-items: center;
}

.page-hero {
    padding: clamp(46px, 7vw, 88px) 0;
    background:
        radial-gradient(circle at 85% 12%, rgba(53, 215, 255, .24), transparent 32%),
        linear-gradient(180deg, #fff 0%, #f4fbff 100%);
}

.page-hero-card,
.media-card,
.image-tile {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: #fff;
    box-shadow: var(--shadow);
}

.page-hero-card img,
.media-card img,
.image-tile img {
    width: 100%;
    height: clamp(250px, 33vw, 430px);
    object-fit: contain;
    background: #edf9ff;
}

.card-grid,
.quick-grid,
.product-grid,
.review-grid,
.notice-grid,
.faq-grid,
.stats-grid,
.feature-grid {
    display: grid;
    gap: 20px;
}

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

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

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

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

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

.card,
.quick-card,
.product-card,
.review-card,
.notice-grid article,
.faq-card,
.stat-card,
.feature-card,
.info-panel {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.card,
.quick-card,
.product-card,
.faq-card,
.feature-card,
.info-panel {
    padding: clamp(22px, 3vw, 32px);
}

.quick-card,
.card,
.product-card,
.feature-card {
    transition: transform .2s ease, box-shadow .2s ease;
}

.quick-card:hover,
.card:hover,
.product-card:hover,
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.card-number,
.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    margin-bottom: 18px;
    border-radius: 14px;
    background: var(--soft);
    color: var(--primary-strong);
    font-weight: 900;
}

.product-card img {
    width: 100%;
    height: 190px;
    margin-bottom: 20px;
    border-radius: 14px;
    object-fit: contain;
    background: #edf9ff;
}

.media-list {
    display: grid;
    gap: 20px;
}

.media-row {
    display: grid;
    grid-template-columns: minmax(220px, .8fr) minmax(0, 1.2fr);
    gap: 26px;
    align-items: center;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.media-row:nth-child(even) {
    grid-template-columns: minmax(0, 1.2fr) minmax(220px, .8fr);
}

.media-row:nth-child(even) .media-row-image {
    order: 2;
}

.media-row-image img {
    width: 100%;
    height: 240px;
    border-radius: 14px;
    object-fit: contain;
    background: #edf9ff;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.tag-list li {
    padding: 8px 13px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--primary-strong);
    font-size: 14px;
    font-weight: 700;
}

.review-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 16px;
    padding: 24px;
}

.review-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #35D7FF, #1688D8);
    color: #fff;
    font-weight: 900;
}

.review-card h3 {
    font-size: 18px;
}

.review-card p {
    margin-bottom: 0;
}

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

.notice-grid article p {
    margin-bottom: 0;
}

.compliance-section {
    border-top: 1px solid var(--border);
}

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

.step-list li {
    counter-increment: step;
    position: relative;
    padding: 20px 20px 20px 76px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #fff;
}

.step-list li::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 20px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--soft);
    color: var(--primary-strong);
    font-weight: 900;
}

.callout {
    padding: clamp(28px, 4vw, 48px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background:
        radial-gradient(circle at 100% 0, rgba(53, 215, 255, .24), transparent 35%),
        #fff;
    box-shadow: var(--shadow);
}

.callout-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.callout-inner p {
    max-width: 760px;
    margin-bottom: 0;
}

.image-gallery {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.image-tile img {
    height: 300px;
}

.faq-card details {
    height: 100%;
}

.faq-card summary {
    cursor: pointer;
    color: var(--deep);
    font-size: 18px;
    font-weight: 800;
}

.faq-card p {
    margin: 16px 0 0;
}

.stat-card {
    padding: 24px;
    text-align: center;
}

.stat-card strong {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-strong);
    font-size: 26px;
}

.site-footer {
    padding: 58px 0 0;
    background: var(--footer);
    color: var(--footer-text);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 36px;
}

.footer-brand img {
    width: 142px;
    max-height: 52px;
    object-fit: contain;
    margin-bottom: 18px;
    filter: brightness(0) invert(1);
}

.site-footer h2,
.site-footer p,
.site-footer a {
    color: var(--footer-text);
}

.site-footer h2 {
    font-size: 18px;
}

.site-footer p {
    opacity: .82;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    opacity: .84;
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-top: 42px;
    padding: 22px 0;
    border-top: 1px solid rgba(255,255,255,.14);
}

.footer-bottom p {
    margin: 0;
    font-size: 14px;
}

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .header-container { justify-content: space-between; }
    .menu-toggle { display: block; }
}

@media (max-width: 900px) {
    .intro-grid,
    .page-hero-grid,
    .split-grid {
        grid-template-columns: 1fr;
    }

    .page-hero-card {
        max-width: 720px;
        margin-inline: auto;
    }

    .quick-grid,
    .card-grid,
    .product-grid,
    .feature-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));
    }
}

@media (max-width: 680px) {
    :root { --header-height: 68px; }

    .header-container,
    .container,
    .carousel {
        width: min(100% - 24px, 1200px);
    }

    .header-container { gap: 8px; }

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

    .header-actions { gap: 7px; }

    .header-actions .main-btn {
        min-height: 40px;
        padding: 8px 15px;
        font-size: 14px;
    }

    .menu-toggle {
        width: 40px;
        height: 40px;
        padding: 8px;
    }

    .carousel {
        border-radius: 18px;
    }

    .carousel-slide img {
        height: clamp(190px, 58vw, 330px);
    }

    .carousel-control {
        width: 40px;
        height: 40px;
        font-size: 22px;
    }

    .carousel-control.prev { left: 8px; }
    .carousel-control.next { right: 8px; }
    .carousel-dots { bottom: 10px; }

    .quick-grid,
    .card-grid,
    .product-grid,
    .review-grid,
    .notice-grid,
    .faq-grid,
    .feature-grid,
    .image-gallery {
        grid-template-columns: 1fr;
    }

    .media-row,
    .media-row:nth-child(even) {
        grid-template-columns: 1fr;
    }

    .media-row:nth-child(even) .media-row-image {
        order: 0;
    }

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

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

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

    .page-hero-card img,
    .media-card img,
    .image-tile img {
        height: 240px;
    }
}

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