*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --page-bg: #F4FBFF;
    --nav-bg: #FFFFFF;
    --soft-bg: #E8F7FF;
    --card-bg: #FFFFFF;
    --primary: #11AEEA;
    --primary-strong: #1688D8;
    --text-blue: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(17, 174, 234, 0.18);
    --footer-bg: #073A68;
    --footer-text: #EAF8FF;
    --shadow: 0 18px 48px rgba(20, 112, 170, 0.12);
    --shadow-soft: 0 10px 30px rgba(20, 112, 170, 0.09);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
}

html {
    scroll-behavior: smooth;
    background: var(--page-bg);
}

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 8%, rgba(53, 215, 255, 0.11), transparent 28rem),
        radial-gradient(circle at 88% 20%, rgba(22, 136, 216, 0.09), transparent 30rem),
        var(--page-bg);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, 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;
    left: 16px;
    top: -80px;
    z-index: 3000;
    padding: 10px 16px;
    border-radius: 10px;
    color: #fff;
    background: var(--primary-strong);
    transition: top .2s ease;
}

.skip-link:focus {
    top: 14px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1200;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(18px);
    box-shadow: 0 6px 24px rgba(7, 58, 104, 0.06);
}

.header-inner {
    width: min(100% - 32px, 1360px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 28px);
}

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

.brand-logo img {
    width: clamp(98px, 9vw, 138px);
    max-height: 50px;
    object-fit: contain;
}

.desktop-nav {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, 1.05vw, 18px);
    overflow: hidden;
}

.desktop-nav a {
    position: relative;
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: clamp(13px, .92vw, 15px);
    font-weight: 700;
    color: #335A75;
    padding: 10px clamp(3px, .35vw, 7px);
    transition: color .2s ease;
}

.desktop-nav a::after {
    content: "";
    position: absolute;
    left: 12%;
    right: 12%;
    bottom: 3px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #35D7FF, #1688D8);
    transform: scaleX(0);
    transition: transform .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 {
    transform: scaleX(1);
}

.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;
    border: 0;
    cursor: pointer;
    white-space: nowrap;
    font-weight: 800;
}

.main-btn {
    min-height: 42px;
    padding: 0 22px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    box-shadow: 0 10px 22px rgba(22, 136, 216, .24);
    transition: transform .2s ease, box-shadow .2s ease;
}

.main-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(22, 136, 216, .28);
}

.secondary-btn {
    min-height: 42px;
    padding: 0 20px;
    border: 1px solid rgba(22, 136, 216, .22);
    border-radius: 999px;
    color: var(--primary-strong);
    background: #fff;
}

.text-link {
    justify-content: flex-start;
    color: var(--primary-strong);
    gap: 7px;
}

.text-link::after {
    content: "→";
    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;
    height: 2px;
    margin: 5px 0;
    border-radius: 999px;
    background: var(--primary-strong);
}

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1390;
    background: rgba(7, 58, 104, .4);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1400;
    width: min(88vw, 380px);
    padding: 20px;
    overflow-y: auto;
    background: #fff;
    box-shadow: -20px 0 50px rgba(7, 58, 104, .18);
    transform: translateX(102%);
    transition: transform .25s ease;
}

.drawer-open .drawer-backdrop {
    opacity: 1;
    visibility: visible;
}

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

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.drawer-logo img {
    width: 120px;
    max-height: 48px;
    object-fit: contain;
}

.drawer-close {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--primary-strong);
    background: var(--soft-bg);
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
}

.drawer-nav {
    display: grid;
    gap: 8px;
    padding: 18px 0;
}

.drawer-nav a {
    padding: 12px 14px;
    border-radius: 12px;
    color: #315871;
    font-weight: 700;
    background: #f8fdff;
}

.drawer-nav a.is-active {
    color: #fff;
    background: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
}

.drawer-register {
    width: 100%;
}

.site-main {
    min-height: 60vh;
}

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

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

.section.tight {
    padding: clamp(38px, 5vw, 66px) 0;
}

.section.soft {
    background: linear-gradient(180deg, rgba(232, 247, 255, .78), rgba(244, 251, 255, .55));
    border-block: 1px solid rgba(17, 174, 234, .09);
}

.section-head {
    max-width: 790px;
    margin-bottom: 30px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    color: var(--primary-strong);
    background: var(--soft-bg);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .08em;
}

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

h1,
h2,
h3 {
    color: var(--text-blue);
    line-height: 1.3;
}

h1 {
    margin-bottom: 18px;
    font-size: clamp(34px, 5.4vw, 66px);
    letter-spacing: -.035em;
}

h2 {
    margin-bottom: 14px;
    font-size: clamp(26px, 3.3vw, 42px);
}

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

.lead {
    max-width: 850px;
    color: var(--muted);
    font-size: clamp(17px, 1.5vw, 20px);
}

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

.page-hero {
    padding: clamp(48px, 7vw, 86px) 0 clamp(36px, 5vw, 64px);
}

.hero-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(320px, .94fr);
    align-items: center;
    gap: clamp(30px, 5vw, 74px);
    padding: clamp(28px, 4vw, 54px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: linear-gradient(145deg, rgba(255,255,255,.96), rgba(232,247,255,.76));
    box-shadow: var(--shadow);
}

.hero-copy .actions,
.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.hero-media,
.feature-image,
.content-media {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fff;
    box-shadow: var(--shadow-soft);
}

.hero-media img,
.feature-image img,
.content-media img {
    width: 100%;
    height: auto;
    object-fit: contain;
    background: #fff;
}

.hero-media img {
    max-height: 480px;
}

.carousel-wrap {
    padding: 24px 0 0;
}

.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    aspect-ratio: 16 / 6.2;
    min-height: 250px;
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: clamp(18px, 2.5vw, 32px);
    background: #eaf8ff;
    box-shadow: var(--shadow);
}

.carousel-track {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity .45s ease, visibility .45s ease;
}

.carousel-slide.is-active {
    opacity: 1;
    visibility: visible;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #eaf8ff;
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 4;
    width: clamp(40px, 4vw, 54px);
    height: clamp(40px, 4vw, 54px);
    border: 1px solid rgba(255,255,255,.68);
    border-radius: 50%;
    color: #fff;
    background: rgba(7, 58, 104, .48);
    backdrop-filter: blur(8px);
    transform: translateY(-50%);
    cursor: pointer;
}

.carousel-arrow.prev {
    left: clamp(10px, 2vw, 28px);
}

.carousel-arrow.next {
    right: clamp(10px, 2vw, 28px);
}

.carousel-dots {
    position: absolute;
    left: 50%;
    bottom: 16px;
    z-index: 5;
    display: flex;
    gap: 9px;
    transform: translateX(-50%);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    padding: 0;
    border: 2px solid rgba(255,255,255,.95);
    border-radius: 50%;
    background: rgba(7,58,104,.38);
    cursor: pointer;
}

.carousel-dot.is-active {
    width: 26px;
    border-radius: 999px;
    background: #fff;
}

.intro-panel {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: clamp(24px, 4vw, 52px);
    align-items: center;
    padding: clamp(30px, 5vw, 58px);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #ffffff, #e8f7ff);
    box-shadow: var(--shadow-soft);
}

.intro-points {
    display: grid;
    gap: 12px;
}

.intro-point {
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(255,255,255,.86);
}

.intro-point strong {
    display: block;
    color: var(--text-blue);
    margin-bottom: 3px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

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

.info-card,
.link-card,
.review-card,
.notice-card,
.faq-item,
.stat-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, .96);
    box-shadow: var(--shadow-soft);
}

.info-card,
.link-card,
.review-card,
.notice-card,
.stat-card {
    padding: 24px;
}

.info-card p,
.link-card p,
.review-card p,
.notice-card p,
.stat-card p {
    margin-bottom: 0;
    color: var(--muted);
}

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

.link-card .text-link {
    margin-top: auto;
    padding-top: 18px;
}

.icon-chip {
    display: inline-grid;
    place-items: center;
    width: 46px;
    height: 46px;
    margin-bottom: 18px;
    border-radius: 15px;
    color: var(--primary-strong);
    background: linear-gradient(145deg, #ecfbff, #dff3ff);
    font-weight: 900;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, .84fr);
    gap: clamp(28px, 5vw, 70px);
    align-items: center;
}

.split.reverse .split-copy {
    order: 2;
}

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

.bullet-list {
    display: grid;
    gap: 12px;
    margin: 20px 0 0;
    padding: 0;
    list-style: none;
}

.bullet-list li {
    position: relative;
    padding-left: 26px;
    color: var(--muted);
}

.bullet-list li::before {
    content: "";
    position: absolute;
    top: .72em;
    left: 2px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: linear-gradient(135deg, #35D7FF, #1688D8);
    box-shadow: 0 0 0 5px rgba(17,174,234,.1);
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.review-card blockquote {
    margin: 0 0 16px;
    color: var(--text);
}

.review-card cite {
    color: var(--primary-strong);
    font-style: normal;
    font-weight: 800;
}

.notice-band {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: center;
    padding: clamp(26px, 4vw, 42px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    color: #fff;
    background:
        linear-gradient(135deg, rgba(7,58,104,.98), rgba(22,136,216,.96)),
        #073A68;
    box-shadow: var(--shadow);
}

.notice-band h2,
.notice-band p {
    color: #fff;
}

.notice-band p {
    margin-bottom: 0;
    opacity: .88;
}

.notice-band .secondary-btn {
    border-color: rgba(255,255,255,.35);
    color: #0d6cab;
}

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

.faq-item {
    overflow: hidden;
}

.faq-item details {
    padding: 0 22px;
}

.faq-item summary {
    padding: 20px 0;
    cursor: pointer;
    color: var(--text-blue);
    font-size: 18px;
    font-weight: 800;
}

.faq-item p {
    padding: 0 0 22px;
    margin: 0;
    color: var(--muted);
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--primary-strong);
    background: #fff;
    font-size: 14px;
    font-weight: 700;
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.stat-card strong {
    display: block;
    color: var(--primary);
    font-size: clamp(26px, 3vw, 40px);
}

.mosaic {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 20px;
}

.mosaic .info-card:nth-child(1) {
    grid-column: span 7;
}

.mosaic .info-card:nth-child(2) {
    grid-column: span 5;
}

.mosaic .info-card:nth-child(3),
.mosaic .info-card:nth-child(4) {
    grid-column: span 6;
}

.site-footer {
    margin-top: 40px;
    color: var(--footer-text);
    background: var(--footer-bg);
}

.footer-inner {
    width: min(100% - 32px, 1240px);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: clamp(34px, 6vw, 90px);
    padding: 58px 0 38px;
}

.footer-brand img {
    width: 132px;
    max-height: 54px;
    margin-bottom: 18px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    max-width: 650px;
    margin-bottom: 0;
    color: rgba(234,248,255,.78);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.footer-links h2 {
    margin-bottom: 12px;
    color: #fff;
    font-size: 17px;
}

.footer-links a {
    display: block;
    padding: 5px 0;
    color: rgba(234,248,255,.78);
}

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

.footer-notice {
    width: min(100% - 32px, 1240px);
    margin: 0 auto;
    padding: 22px 0 30px;
    border-top: 1px solid rgba(234,248,255,.16);
    color: rgba(234,248,255,.7);
    font-size: 14px;
}

.footer-notice p:last-child {
    margin-bottom: 0;
}

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

    .menu-toggle {
        display: block;
    }

    .header-inner {
        min-height: 70px;
    }

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

@media (max-width: 920px) {
    .hero-shell,
    .intro-panel,
    .split,
    .footer-inner,
    .notice-band {
        grid-template-columns: 1fr;
    }

    .hero-media {
        max-width: 720px;
        margin: 0 auto;
    }

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

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

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

    .notice-band .secondary-btn {
        justify-self: start;
    }
}

@media (max-width: 680px) {
    .container,
    .header-inner,
    .carousel,
    .footer-inner,
    .footer-notice {
        width: min(100% - 24px, 1240px);
    }

    .header-inner {
        gap: 8px;
    }

    .brand-logo img {
        width: 98px;
    }

    .header-actions {
        gap: 7px;
    }

    .header-actions .main-btn {
        min-height: 40px;
        padding: 0 16px;
    }

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

    .carousel {
        aspect-ratio: 16 / 9.2;
        min-height: 190px;
    }

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

    .card-grid,
    .card-grid.four,
    .review-grid,
    .stats {
        grid-template-columns: 1fr;
    }

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

    .mosaic .info-card:nth-child(n) {
        grid-column: auto;
    }

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

    .section {
        padding: 54px 0;
    }

    .page-hero {
        padding-top: 38px;
    }

    h1 {
        font-size: clamp(32px, 11vw, 48px);
    }
}

@media (max-width: 420px) {
    .header-actions .main-btn {
        padding: 0 13px;
        font-size: 14px;
    }

    .brand-logo img {
        width: 88px;
    }

    .footer-links {
        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;
    }
}