* {
    box-sizing: border-box;
}

:root {
    --bg: #F3F7FC;
    --white: #FFFFFF;
    --soft: #EEF4FB;
    --soft-deep: #E7F0FA;
    --title: #163B66;
    --nav: #32506E;
    --blue: #169BFF;
    --orange: #FF9F1A;
    --text: #243447;
    --muted: #607388;
    --hint: #8A9AAF;
    --border: rgba(22,59,102,0.10);
    --shadow: 0 14px 36px rgba(35,70,110,0.10);
    --button: linear-gradient(180deg, #31C4FF 0%, #189DFF 100%);
    --footer: #163B66;
    --footer-text: #EAF4FF;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
}

body.drawer-open {
    overflow: hidden;
}

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

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

p {
    margin: 0 0 14px;
}

.site-header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: #FFFFFF;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(35,70,110,0.08);
}

.header-inner {
    max-width: 1240px;
    min-height: 76px;
    margin: 0 auto;
    padding: 0 22px;
    display: flex;
    align-items: center;
    gap: 22px;
}

.text-logo {
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    font-size: 28px;
    font-weight: 800;
    color: #163B66;
    letter-spacing: 1px;
    line-height: 1;
}

.text-logo span {
    color: #169BFF;
}

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav::-webkit-scrollbar {
    display: none;
}

.nav a {
    position: relative;
    padding: 25px 9px 22px;
    color: #32506E;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
}

.nav a::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 13px;
    height: 3px;
    border-radius: 999px;
    background: transparent;
}

.nav a:hover,
.nav a.active {
    color: #169BFF;
}

.nav a.active::after {
    background: #169BFF;
}

.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 24px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, #31C4FF 0%, #189DFF 100%);
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 10px 24px rgba(22,155,255,0.25);
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease;
}

.main-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(22,155,255,0.32);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 14px;
    background: #EEF4FB;
    padding: 9px;
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    background: #163B66;
    border-radius: 3px;
}

.container {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
}

main {
    padding-top: 76px;
}

.section {
    padding: 64px 0;
}

.section.compact {
    padding: 44px 0;
}

.hero {
    padding: 78px 0 64px;
    background:
        radial-gradient(circle at top left, rgba(22,155,255,.12), transparent 34%),
        linear-gradient(180deg, #F3F7FC 0%, #EEF4FB 100%);
}

.page-hero {
    padding: 70px 0 56px;
    background:
        radial-gradient(circle at 15% 20%, rgba(49,196,255,.18), transparent 30%),
        linear-gradient(180deg, #F3F7FC 0%, #E7F0FA 100%);
}

.hero-grid,
.split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr);
    gap: 42px;
    align-items: center;
}

.hero h1,
.page-hero h1 {
    margin: 0 0 18px;
    color: #163B66;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.13;
    letter-spacing: -1px;
}

h1, h2, h3, .section-title {
    color: #163B66;
}

.section-head {
    max-width: 780px;
    margin-bottom: 26px;
}

.section-title {
    margin: 0 0 12px;
    font-size: clamp(26px, 4vw, 38px);
    line-height: 1.25;
}

.section-desc {
    color: #607388;
    font-size: 16px;
}

.lead {
    color: #607388;
    font-size: 18px;
}

.highlight,
.text-link {
    color: #169BFF;
}

.text-link {
    font-weight: 800;
}

.text-link:hover {
    text-decoration: underline;
}

.tag,
.number-badge {
    color: #FF9F1A;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    background: #FFFFFF;
    color: #169BFF;
    border: 1px solid rgba(22,155,255,.18);
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 18px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.card,
.zone-card,
.info-card,
.review-card,
.faq-card,
.step-card,
.notice-card,
.product-card,
.feature-card {
    background: rgba(255,255,255,0.96);
    border: 1px solid rgba(22,59,102,0.10);
    box-shadow: 0 14px 36px rgba(35,70,110,0.10);
    border-radius: 24px;
}

.media-card {
    overflow: hidden;
    padding: 14px;
}

.media-card img {
    width: 100%;
    border-radius: 18px;
    object-fit: contain;
    background: #FFFFFF;
}

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

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.category-card,
.feature-card,
.zone-card,
.product-card,
.info-card,
.review-card,
.faq-card,
.step-card,
.notice-card {
    padding: 24px;
}

.category-card h3,
.feature-card h3,
.zone-card h3,
.product-card h3,
.info-card h3,
.review-card h3,
.faq-card h3,
.step-card h3,
.notice-card h3 {
    margin: 0 0 10px;
    font-size: 20px;
    color: #163B66;
}

.category-card p,
.feature-card p,
.zone-card p,
.product-card p,
.info-card p,
.review-card p,
.faq-card p,
.step-card p,
.notice-card p {
    color: #607388;
}

.category-card .text-link,
.product-card .text-link,
.feature-card .text-link {
    display: inline-flex;
    margin-top: 4px;
}

.image-title {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.image-title img {
    width: 100%;
    border-radius: 18px;
    object-fit: contain;
    background: #FFFFFF;
    border: 1px solid rgba(22,59,102,0.08);
}

.soft-band {
    background: #EEF4FB;
}

.deep-band {
    background: #E7F0FA;
}

.steps {
    counter-reset: step;
}

.step-card {
    position: relative;
}

.step-card::before {
    counter-increment: step;
    content: counter(step);
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    border-radius: 50%;
    background: #E7F0FA;
    color: #FF9F1A;
    font-weight: 900;
}

.review-card {
    position: relative;
}

.review-card::before {
    content: "“";
    position: absolute;
    top: 12px;
    right: 22px;
    color: rgba(22,155,255,0.20);
    font-size: 76px;
    line-height: 1;
    font-family: Georgia, serif;
}

.review-name {
    color: #163B66;
    font-weight: 800;
    margin-top: 10px;
}

.notice-card {
    border-left: 4px solid #169BFF;
}

.notice-card.orange {
    border-left-color: #FF9F1A;
}

.list-check {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-check li {
    position: relative;
    padding-left: 24px;
    margin: 10px 0;
    color: #607388;
}

.list-check li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #169BFF;
    box-shadow: 0 0 0 4px rgba(22,155,255,.12);
}

.faq-list {
    display: grid;
    gap: 18px;
}

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

.footer-logo {
    color: #EAF4FF;
    margin-bottom: 16px;
}

.footer-logo span {
    color: #31C4FF;
}

.site-footer {
    background: #163B66;
    color: #EAF4FF;
    padding: 54px 0 0;
}

.site-footer p {
    color: rgba(234,244,255,.82);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, .8fr);
    gap: 30px;
}

.site-footer h3 {
    color: #FFFFFF;
    margin: 0 0 14px;
}

.site-footer a {
    display: block;
    color: rgba(234,244,255,.82);
    margin: 8px 0;
}

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

.footer-bottom {
    margin-top: 34px;
    padding: 18px;
    text-align: center;
    background: rgba(0,0,0,.10);
}

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

.drawer-mask {
    position: fixed;
    inset: 0;
    background: rgba(16, 34, 55, .44);
    z-index: 1500;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease;
}

.drawer-mask.show {
    opacity: 1;
    pointer-events: auto;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1600;
    width: min(88vw, 360px);
    height: 100vh;
    background: #FFFFFF;
    padding: 22px;
    transform: translateX(-105%);
    transition: transform .25s ease;
    box-shadow: 0 20px 60px rgba(16,34,55,.22);
    overflow-y: auto;
}

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

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.drawer-close {
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 12px;
    background: #EEF4FB;
    color: #163B66;
    font-size: 28px;
    line-height: 1;
}

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

.drawer-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: #32506E;
    font-weight: 800;
    background: #F3F7FC;
}

.drawer-nav a.active {
    color: #169BFF;
    background: #E7F0FA;
}

.drawer-btn {
    width: 100%;
    margin: 20px 0 14px;
}

.drawer-note {
    color: #8A9AAF;
    font-size: 13px;
}

.breadcrumb {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    color: #607388;
    font-size: 14px;
}

.breadcrumb a {
    color: #169BFF;
    font-weight: 800;
}

.kpi-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 26px;
}

.kpi {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255,255,255,.75);
    border: 1px solid rgba(22,59,102,0.10);
}

.kpi strong {
    display: block;
    color: #163B66;
    font-size: 24px;
}

.kpi span {
    color: #607388;
    font-size: 13px;
}

@media (max-width: 1080px) {
    .desktop-nav {
        display: none;
    }
    .menu-toggle {
        display: block;
    }
    .header-inner {
        justify-content: space-between;
        gap: 14px;
    }
    .header-btn {
        padding: 0 18px;
    }
    .hero-grid,
    .split-grid {
        grid-template-columns: 1fr;
    }
    .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 680px) {
    .container {
        width: min(100% - 28px, 1180px);
    }
    .header-inner {
        min-height: 68px;
        padding: 0 14px;
    }
    main {
        padding-top: 68px;
    }
    .text-logo {
        font-size: 23px;
    }
    .header-btn {
        min-height: 38px;
        padding: 0 15px;
        font-size: 14px;
    }
    .hero,
    .page-hero {
        padding: 52px 0 42px;
    }
    .section {
        padding: 46px 0;
    }
    .grid-2,
    .grid-3,
    .grid-4,
    .kpi-row {
        grid-template-columns: 1fr;
    }
    .category-card,
    .feature-card,
    .zone-card,
    .product-card,
    .info-card,
    .review-card,
    .faq-card,
    .step-card,
    .notice-card {
        padding: 20px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-actions {
        align-items: stretch;
        flex-direction: column;
    }
    .hero-actions .main-btn {
        width: 100%;
    }
}