:root {
    --bg: #F4FBFF;
    --surface: #FFFFFF;
    --surface-soft: #E8F7FF;
    --primary: #10AEEA;
    --primary-deep: #1688D8;
    --title: #155A9D;
    --text: #24384A;
    --muted: #60758A;
    --border: rgba(16, 174, 234, 0.18);
    --shadow: 0 18px 48px rgba(21, 90, 157, 0.10);
    --shadow-soft: 0 10px 30px rgba(21, 90, 157, 0.08);
    --gradient: linear-gradient(135deg, #35D7FF 0%, #1688D8 100%);
    --footer: #073A68;
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --container: min(100% - 32px, 1240px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}
body.drawer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

.skip-link {
    position: fixed;
    left: 16px;
    top: -100px;
    z-index: 2000;
    padding: 10px 16px;
    border-radius: 10px;
    background: #073A68;
    color: #fff;
    transition: top .2s ease;
}
.skip-link:focus { top: 12px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(21, 90, 157, 0.06);
    backdrop-filter: blur(16px);
}
.header-inner {
    width: min(100% - 32px, 1360px);
    min-height: 76px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: clamp(12px, 1.6vw, 24px);
}
.brand-logo { flex: 0 0 auto; width: clamp(112px, 10vw, 150px); }
.brand-logo img { width: 100%; height: 48px; object-fit: contain; object-position: left center; }
.desktop-nav {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(5px, .65vw, 12px);
}
.nav-link {
    position: relative;
    flex: 0 0 auto;
    padding: 9px clamp(4px, .35vw, 8px);
    color: #3B5F7E;
    font-size: clamp(12px, .83vw, 14px);
    font-weight: 650;
    line-height: 1;
    white-space: nowrap;
    border-radius: 9px;
    transition: color .2s ease, background .2s ease;
}
.nav-link:hover, .nav-link.active { color: var(--primary-deep); background: var(--surface-soft); }
.nav-link.active::after {
    content: "";
    position: absolute;
    left: 28%; right: 28%; bottom: 2px;
    height: 2px;
    border-radius: 999px;
    background: var(--gradient);
}
.header-actions { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 22px;
    border: 0;
    border-radius: 999px;
    background: var(--gradient);
    color: #fff;
    font-weight: 750;
    line-height: 1;
    white-space: nowrap;
    box-shadow: 0 10px 24px rgba(22, 136, 216, .22);
    transition: transform .2s ease, box-shadow .2s ease;
}
.main-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22, 136, 216, .28); }
.main-btn.secondary { background: #fff; color: var(--primary-deep); border: 1px solid var(--border); box-shadow: none; }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: #fff;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}
.menu-toggle span { width: 20px; height: 2px; border-radius: 999px; background: var(--primary-deep); }

.drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1090;
    background: rgba(7, 58, 104, .38);
    opacity: 0;
    transition: opacity .22s ease;
}
.drawer-backdrop.is-visible { opacity: 1; }
.mobile-drawer {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    z-index: 1100;
    width: min(86vw, 360px);
    padding: 18px;
    background: #fff;
    box-shadow: -18px 0 48px rgba(7, 58, 104, .18);
    transform: translateX(104%);
    transition: transform .24s ease;
    overflow-y: auto;
}
.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-logo { width: 132px; }
.drawer-logo img { width: 100%; height: 42px; object-fit: contain; object-position: left center; }
.drawer-close { width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--surface-soft); color: var(--title); font-size: 28px; line-height: 1; }
.drawer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 18px 0; }
.drawer-link { padding: 11px 12px; border-radius: 12px; color: #385C7A; background: #F8FCFF; font-size: 14px; font-weight: 650; }
.drawer-link:hover, .drawer-link.active { color: var(--primary-deep); background: var(--surface-soft); }
.drawer-register { width: 100%; }

main { min-height: 60vh; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: clamp(54px, 7vw, 94px) 0; }
.section.compact { padding: clamp(38px, 5vw, 66px) 0; }
.section.soft { background: var(--surface-soft); }
.section.white { background: var(--surface); }
.section-head { max-width: 780px; margin-bottom: clamp(26px, 4vw, 42px); }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--primary-deep);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .08em;
}
.eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 999px; background: var(--gradient); }
h1, h2, h3 { margin: 0 0 14px; color: var(--title); line-height: 1.25; letter-spacing: -.02em; }
h1 { font-size: clamp(32px, 5vw, 58px); }
h2 { font-size: clamp(26px, 3.6vw, 42px); }
h3 { font-size: clamp(18px, 2.1vw, 24px); }
p { margin: 0 0 16px; }
.lead { color: #3A607F; font-size: clamp(16px, 1.6vw, 20px); line-height: 1.85; }
.muted { color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--primary-deep); font-weight: 750; }
.text-link::after { content: "→"; transition: transform .2s ease; }
.text-link:hover::after { transform: translateX(4px); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.hero-copy {
    padding: clamp(54px, 7vw, 90px) 0;
    background:
        radial-gradient(circle at 88% 8%, rgba(53, 215, 255, .22), transparent 26%),
        linear-gradient(180deg, #fff 0%, #F4FBFF 100%);
}
.hero-copy .content { max-width: 880px; }
.hero-copy h1 { max-width: 820px; }
.hero-copy .lead { max-width: 820px; }

.page-hero {
    position: relative;
    overflow: hidden;
    padding: clamp(62px, 8vw, 108px) 0;
    background:
        radial-gradient(circle at 92% 12%, rgba(53, 215, 255, .30), transparent 28%),
        radial-gradient(circle at 10% 88%, rgba(22, 136, 216, .12), transparent 26%),
        linear-gradient(145deg, #FFFFFF 0%, #E8F7FF 100%);
}
.page-hero::after {
    content: "";
    position: absolute;
    right: -80px;
    bottom: -100px;
    width: 320px;
    height: 320px;
    border: 48px solid rgba(16, 174, 234, .08);
    border-radius: 50%;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .content { max-width: 830px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary-deep); }

.carousel-wrap { padding: 20px 0 0; background: #fff; }
.carousel {
    position: relative;
    width: min(100% - 32px, 1360px);
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 6.4;
    min-height: 240px;
}
.carousel-track { display: flex; height: 100%; transition: transform .55s cubic-bezier(.22,.75,.3,1); }
.carousel-slide { flex: 0 0 100%; height: 100%; }
.carousel-slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; background: #E8F7FF; }
.carousel-arrow {
    position: absolute;
    top: 50%;
    z-index: 3;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,.65);
    border-radius: 50%;
    transform: translateY(-50%);
    background: rgba(7, 58, 104, .48);
    color: #fff;
    font-size: 30px;
    line-height: 1;
    backdrop-filter: blur(8px);
}
.carousel-arrow.prev { left: 18px; }
.carousel-arrow.next { right: 18px; }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; z-index: 3; display: flex; gap: 9px; transform: translateX(-50%); }
.carousel-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.62); box-shadow: 0 0 0 1px rgba(7,58,104,.16); }
.carousel-dot.active { width: 28px; border-radius: 999px; background: #fff; }

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
    min-width: 0;
    padding: clamp(22px, 2.6vw, 32px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}
.card p:last-child { margin-bottom: 0; }
.card-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin-bottom: 20px;
    border-radius: 13px;
    background: var(--surface-soft);
    color: var(--primary-deep);
    font-weight: 850;
}
.quick-card { display: flex; flex-direction: column; min-height: 260px; }
.quick-card .text-link { margin-top: auto; padding-top: 14px; }
.feature-card { overflow: hidden; padding: 0; }
.feature-card .media { aspect-ratio: 16 / 10; background: var(--surface-soft); }
.feature-card .media img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.feature-card .body { padding: clamp(22px, 2.5vw, 30px); }

.split {
    display: grid;
    grid-template-columns: minmax(0, 1.04fr) minmax(360px, .96fr);
    gap: clamp(28px, 5vw, 70px);
    align-items: center;
}
.split.reverse .media { order: -1; }
.split .media {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-soft);
    box-shadow: var(--shadow);
}
.split .media img { width: 100%; min-height: 320px; max-height: 520px; object-fit: contain; object-position: center; }
.check-list { display: grid; gap: 12px; padding: 0; margin: 24px 0 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; color: #355A78; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary-deep); font-weight: 900; }

.category-strip { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.category-pill { padding: 16px 12px; border: 1px solid var(--border); border-radius: 14px; background: #fff; color: var(--title); text-align: center; font-weight: 750; box-shadow: 0 8px 20px rgba(21,90,157,.05); }
.category-pill:hover { background: var(--surface-soft); color: var(--primary-deep); }

.info-band {
    padding: clamp(26px, 4vw, 42px);
    border: 1px solid rgba(16,174,234,.24);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #FFFFFF 0%, #E8F7FF 100%);
    box-shadow: var(--shadow-soft);
}
.info-band h2 { font-size: clamp(24px, 3vw, 34px); }

.steps { counter-reset: step; }
.step-card { position: relative; padding-top: 66px; }
.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: 22px;
    left: 24px;
    color: rgba(22,136,216,.28);
    font-size: 38px;
    font-weight: 900;
    line-height: 1;
}

.testimonial { position: relative; padding-top: 56px; }
.testimonial::before { content: "“"; position: absolute; left: 24px; top: 8px; color: rgba(16,174,234,.30); font-size: 64px; font-family: Georgia, serif; line-height: 1; }
.testimonial .role { margin-top: 18px; color: var(--primary-deep); font-weight: 800; }

.faq-list { display: grid; gap: 14px; }
.faq-item { overflow: hidden; border: 1px solid var(--border); border-radius: 16px; background: #fff; }
.faq-item summary { position: relative; padding: 20px 56px 20px 22px; color: var(--title); font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--primary-deep); font-size: 26px; font-weight: 500; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 22px 22px; color: #496B87; }

.notice-box { padding: clamp(24px, 3.5vw, 38px); border-left: 5px solid var(--primary); border-radius: 0 var(--radius-md) var(--radius-md) 0; background: #fff; box-shadow: var(--shadow-soft); }
.notice-box h2 { font-size: clamp(22px, 2.8vw, 32px); }

.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 8px; }
.field label { color: var(--title); font-weight: 750; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid var(--border); border-radius: 13px; background: #F9FDFF; color: var(--text); padding: 13px 14px; outline: none; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(16,174,234,.10); }
.field textarea { min-height: 150px; resize: vertical; }

.site-footer { background: var(--footer); color: #EAF8FF; }
.footer-inner { width: var(--container); margin: 0 auto; padding: 58px 0 40px; display: grid; grid-template-columns: 1.2fr 1.8fr; gap: clamp(40px, 8vw, 100px); }
.footer-brand img { width: 150px; height: 52px; margin-bottom: 20px; object-fit: contain; object-position: left center; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 480px; color: rgba(234,248,255,.78); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-links h2 { margin-bottom: 18px; color: #fff; font-size: 17px; }
.footer-links a { display: block; margin: 9px 0; color: rgba(234,248,255,.78); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-notice { width: var(--container); margin: 0 auto; padding: 24px 0 30px; border-top: 1px solid rgba(234,248,255,.15); color: rgba(234,248,255,.68); font-size: 13px; }
.footer-notice p { margin-bottom: 8px; }

.back-to-top { position: fixed; right: 20px; bottom: 20px; z-index: 800; width: 46px; height: 46px; border: 0; border-radius: 50%; background: var(--gradient); color: #fff; font-size: 20px; box-shadow: 0 12px 28px rgba(22,136,216,.28); opacity: 0; pointer-events: none; transform: translateY(10px); transition: .2s ease; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 1179px) {
    .desktop-nav { display: none; }
    .menu-toggle { display: inline-flex; }
    .header-inner { min-height: 70px; }
    .brand-logo { margin-right: auto; }
}
@media (max-width: 960px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .split { grid-template-columns: 1fr; }
    .split .media, .split.reverse .media { order: 0; }
    .category-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    :root { --container: min(100% - 24px, 1240px); }
    .header-inner { width: min(100% - 24px, 1360px); }
    .brand-logo { width: 112px; }
    .brand-logo img { height: 42px; }
    .main-btn { min-height: 40px; padding: 0 18px; }
    .carousel { width: min(100% - 24px, 1360px); aspect-ratio: 16 / 9; min-height: 205px; border-radius: 20px; }
    .carousel-arrow { width: 40px; height: 40px; font-size: 26px; }
    .carousel-arrow.prev { left: 10px; }
    .carousel-arrow.next { right: 10px; }
    .carousel-dots { bottom: 10px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .category-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .quick-card { min-height: auto; }
    .form-row { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
    .split .media img { min-height: 240px; }
}
@media (max-width: 480px) {
    .header-actions { gap: 8px; }
    .header-actions .main-btn { padding: 0 15px; }
    .menu-toggle { width: 40px; height: 40px; }
    .drawer-nav { grid-template-columns: 1fr; }
    .carousel { min-height: 190px; }
    .carousel-arrow { width: 36px; height: 36px; }
    .footer-links { grid-template-columns: 1fr 1fr; gap: 18px; }
    .card { padding: 22px 20px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}