* {
    box-sizing: border-box;
}

:root {
    --bg: #E6EBF2;
    --bg-soft: #F5F7FB;
    --surface: #FFFFFF;
    --surface-alt: #EEF2F7;
    --line: rgba(40, 156, 255, 0.16);
    --primary: #289CFF;
    --text: #243447;
    --muted: #66788A;
    --quiet: #8A9AAF;
    --shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    --shadow-strong: 0 18px 40px rgba(56, 92, 138, 0.12);
    --radius: 22px;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.75;
    overflow-x: hidden;
}

body.drawer-open {
    overflow: hidden;
}

img {
    max-width: 100%;
}

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

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

button {
    font: inherit;
}

.container {
    width: min(1200px, calc(100% - 40px));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    left: 14px;
    top: -60px;
    z-index: 12000;
    padding: 10px 16px;
    border-radius: 10px;
    background: #243447;
    color: #fff;
    transition: top .2s ease;
}

.skip-link:focus {
    top: 12px;
}

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 900;
    background: rgba(245, 247, 251, 0.94);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(56, 92, 138, 0.10);
}

.header-main {
    background: rgba(245, 247, 251, 0.94);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 76px;
}

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

.logo img {
    max-height: 52px;
    width: auto;
    display: block;
}

.nav-core {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    white-space: nowrap;
    flex-wrap: nowrap;
}

.nav-core a {
    color: #4E5F7A;
    position: relative;
    font-weight: 600;
    padding: 10px 7px;
    border-radius: 10px;
    transition: color .2s ease, background .2s ease;
}

.nav-core a:hover,
.nav-core a.active {
    color: var(--primary);
    background: rgba(40, 156, 255, 0.06);
}

.nav-core a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -7px;
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: var(--primary);
    transform: translateX(-50%);
}

.main-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 24px;
    background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    color: #FFFFFF;
    border-radius: 999px;
    border: 0;
    font-weight: 700;
    box-shadow: 0 10px 24px rgba(36, 155, 255, 0.24);
    transition: transform .2s ease, box-shadow .2s ease;
}

.main-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 28px rgba(36, 155, 255, 0.30);
}

.header-register {
    flex: 0 0 auto;
    white-space: nowrap;
}

.channel-bar {
    background: rgba(255, 255, 255, 0.78);
    border-top: 1px solid rgba(40, 156, 255, 0.10);
    border-bottom: 1px solid rgba(40, 156, 255, 0.10);
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: thin;
}

.channel-inner {
    display: flex;
    align-items: center;
    gap: 5px;
    padding-block: 8px;
}

.channel-bar a {
    color: var(--muted);
    border-radius: 999px;
    padding: 8px 13px;
    line-height: 1.2;
    font-size: 14px;
    transition: color .2s ease, background .2s ease;
}

.channel-bar a:hover,
.channel-bar a.active {
    color: var(--primary);
    background: rgba(40, 156, 255, 0.10);
}

.site-main {
    padding-top: 138px;
    min-height: 70vh;
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 0;
    background: transparent;
    border-radius: 12px;
    padding: 9px;
}

.menu-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    border-radius: 999px;
    background: #4E5F7A;
}

.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: rgba(21, 40, 63, 0.42);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
}

.mobile-drawer {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 10000;
    width: min(84vw, 320px);
    background: #FFFFFF;
    transform: translateX(-104%);
    transition: transform .28s ease;
    box-shadow: 20px 0 48px rgba(36, 52, 71, 0.18);
    overflow-y: auto;
}

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

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

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

.drawer-logo img {
    max-height: 46px;
    width: auto;
    display: block;
}

.drawer-close {
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 50%;
    background: var(--surface-alt);
    color: #4E5F7A;
    font-size: 26px;
    line-height: 1;
}

.drawer-nav {
    display: grid;
    padding: 14px 18px 28px;
}

.drawer-nav a {
    padding: 11px 10px;
    border-bottom: 1px solid rgba(40, 156, 255, 0.09);
    color: var(--muted);
    font-weight: 600;
}

.drawer-nav a:hover {
    color: var(--primary);
    background: rgba(40, 156, 255, 0.06);
}

.floating-service {
    position: fixed;
    right: 18px;
    top: 42%;
    z-index: 600;
    display: grid;
    gap: 8px;
}

.floating-service a,
.floating-service button {
    width: 54px;
    min-height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: #FFFFFF;
    color: var(--primary);
    border: 1px solid rgba(40, 156, 255, 0.16);
    box-shadow: 0 14px 30px rgba(56, 92, 138, 0.12);
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
}

.floating-service a.register-link {
    background: linear-gradient(180deg, #32D1F6 0%, #27B9F4 35%, #249BFF 100%);
    color: #FFFFFF;
}

.mobile-bottom-nav {
    display: none;
}

.banner-slider {
    width: min(1200px, calc(100% - 40px));
    height: clamp(300px, 33vw, 400px);
    margin: 28px auto 36px;
    border-radius: 22px;
    background: #FFFFFF;
    box-shadow: 0 18px 40px rgba(56, 92, 138, 0.12);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.banner-slider .slide {
    display: none;
    width: 100%;
    height: 100%;
}

.banner-slider .slide.active {
    display: block;
}

.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #FFFFFF;
    display: block;
}

.banner-caption,
.banner-text,
.slide-title,
.slide-desc,
.slide-content,
.slide-card,
.banner-card {
    display: none !important;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.86);
    color: var(--primary);
    box-shadow: 0 8px 20px rgba(56, 92, 138, 0.16);
    font-size: 30px;
    cursor: pointer;
}

.slider-prev { left: 16px; }
.slider-next { right: 16px; }

.slider-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}

.slider-dots button {
    width: 9px;
    height: 9px;
    padding: 0;
    border-radius: 50%;
    border: none;
    background: rgba(40, 156, 255, 0.24);
    cursor: pointer;
}

.slider-dots button.active {
    background: var(--primary);
}

.section {
    padding: 38px 0;
}

.section-tight {
    padding: 24px 0;
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 22px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .08em;
}

h1,
h2,
h3,
.section-title {
    color: var(--primary);
    line-height: 1.35;
}

h1 {
    margin: 0 0 16px;
    font-size: clamp(32px, 5vw, 56px);
}

h2 {
    margin: 0;
    font-size: clamp(24px, 3vw, 36px);
}

h3 {
    margin: 0 0 10px;
    font-size: 20px;
}

p {
    margin: 0 0 14px;
}

.lead {
    color: var(--muted);
    font-size: 18px;
    max-width: 760px;
}

.text-link {
    color: var(--primary);
    font-weight: 700;
}

.card,
.zone-card,
.info-card,
.review-card,
.faq-card,
.notice-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(40, 156, 255, 0.16);
    box-shadow: 0 14px 36px rgba(56, 92, 138, 0.10);
    border-radius: var(--radius);
}

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

.card p,
.info-card p,
.review-card p,
.notice-card p,
.zone-card p {
    color: var(--muted);
}

.grid-2,
.grid-3,
.grid-4,
.grid-5,
.zone-grid,
.review-grid,
.quick-grid,
.product-grid,
.compliance-grid {
    display: grid;
    gap: 20px;
}

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

.brand-intro,
.split-media,
.app-feature,
.page-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
    align-items: center;
    gap: 34px;
}

.brand-intro,
.split-media,
.app-feature,
.page-hero-inner {
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.content-img,
.zone-card img,
.app-section img,
.page-hero-media img {
    width: 100%;
    height: 260px;
    object-fit: contain;
    background: #FFFFFF;
    border-radius: 18px;
    display: block;
}

.content-actions {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

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

.quick-item {
    padding: 20px;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--line);
    border-radius: 18px;
    transition: transform .2s ease, box-shadow .2s ease;
}

.quick-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.quick-item p {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 14px;
}

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

.product-card {
    padding: 24px;
    border-radius: 20px;
    background: linear-gradient(145deg, rgba(255,255,255,.94), rgba(238,242,247,.88));
    border: 1px solid var(--line);
}

.product-card p {
    color: var(--muted);
}

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

.zone-card {
    overflow: hidden;
}

.zone-card img {
    height: 178px;
    border-radius: 0;
    border-bottom: 1px solid var(--line);
}

.zone-card-body {
    padding: 22px;
}

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

.review-card strong {
    display: block;
    margin-top: 12px;
    color: var(--primary);
}

.faq-list {
    display: grid;
    gap: 12px;
}

.faq-card {
    overflow: hidden;
}

.faq-card summary {
    cursor: pointer;
    list-style: none;
    padding: 18px 22px;
    color: var(--text);
    font-weight: 800;
    position: relative;
}

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

.faq-card summary::after {
    content: "+";
    position: absolute;
    right: 22px;
    color: var(--primary);
    font-size: 24px;
    line-height: 1;
}

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

.faq-card p {
    padding: 0 22px 20px;
    color: var(--muted);
}

.page-hero {
    padding: 40px 0 24px;
}

.page-hero-inner {
    min-height: 390px;
}

.page-hero-copy .lead {
    max-width: 680px;
}

.page-hero-media img {
    height: 300px;
}

.stat-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.stat-item {
    padding: 16px;
    border-radius: 16px;
    background: var(--surface-alt);
    color: var(--muted);
}

.stat-item strong {
    display: block;
    color: var(--primary);
    font-size: 18px;
}

.steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
}

.step-item {
    counter-increment: step;
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    padding: 18px;
    border-radius: 18px;
    background: rgba(255,255,255,.88);
    border: 1px solid var(--line);
}

.step-item::before {
    content: counter(step, decimal-leading-zero);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(40,156,255,.11);
    color: var(--primary);
    font-weight: 800;
}

.step-item h3 {
    margin-top: 2px;
}

.info-list {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.info-list li {
    margin-bottom: 9px;
}

.notice-card {
    border-left: 4px solid var(--primary);
}

.compliance-strip {
    padding: 30px 0;
    background: #DDE4EE;
    border-top: 1px solid rgba(40,156,255,.12);
}

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

.compliance-grid > div {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255,255,255,.62);
}

.compliance-grid strong {
    color: var(--primary);
}

.compliance-grid p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.site-footer {
    background: #243447;
    color: #EAF3FF;
    padding: 48px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.7fr repeat(3, 1fr);
    gap: 32px;
}

.footer-brand img {
    max-height: 52px;
    width: auto;
    display: block;
    filter: brightness(1.15);
}

.footer-brand p {
    margin-top: 18px;
    color: #BFD0E4;
    max-width: 440px;
}

.site-footer h2 {
    color: #FFFFFF;
    font-size: 17px;
    margin-bottom: 14px;
}

.site-footer a:not(.footer-brand a) {
    display: block;
    color: #BFD0E4;
    margin: 7px 0;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 34px;
    padding-top: 18px;
    border-top: 1px solid rgba(234,243,255,.14);
    color: #9DB1C8;
    font-size: 13px;
}

.register-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 30px;
    background: #E6EBF2;
}

.register-box {
    width: min(680px, 100%);
    padding: 36px;
    border-radius: 28px;
    background: #fff;
    box-shadow: var(--shadow-strong);
    text-align: center;
}

.register-box img {
    max-height: 58px;
    width: auto;
}

.register-box p {
    color: var(--muted);
}

@media (max-width: 1100px) {
    .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .floating-service { display: none; }
}

@media (max-width: 900px) {
    .nav-core { gap: 12px; }
    .nav-core a { padding-inline: 5px; font-size: 14px; }
    .brand-intro,
    .split-media,
    .app-feature,
    .page-hero-inner {
        grid-template-columns: 1fr;
    }
    .page-hero-media { order: -1; }
    .page-hero-inner { min-height: auto; }
    .product-grid,
    .zone-grid,
    .review-grid,
    .grid-3,
    .compliance-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .banner-slider { height: clamp(230px, 36vw, 320px); }
}

@media (max-width: 720px) {
    .container,
    .banner-slider {
        width: min(100% - 24px, 1200px);
    }
    .site-header { box-shadow: 0 6px 18px rgba(56,92,138,.10); }
    .header-inner {
        min-height: 70px;
        gap: 10px;
        display: grid;
        grid-template-columns: 48px minmax(0, 1fr) auto;
    }
    .menu-toggle { display: block; }
    .logo { justify-self: center; }
    .logo img { max-height: 44px; max-width: 130px; }
    .nav-core,
    .channel-bar { display: none; }
    .header-register { min-height: 40px; padding: 8px 17px; }
    .site-main { padding-top: 78px; padding-bottom: 72px; }
    .mobile-bottom-nav {
        position: fixed;
        inset: auto 0 0 0;
        z-index: 850;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        padding: 8px max(8px, env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
        background: rgba(255,255,255,.96);
        border-top: 1px solid var(--line);
        backdrop-filter: blur(10px);
        box-shadow: 0 -8px 24px rgba(56,92,138,.10);
    }
    .mobile-bottom-nav a {
        text-align: center;
        padding: 7px 4px;
        color: var(--muted);
        font-size: 13px;
        font-weight: 700;
        border-radius: 10px;
    }
    .mobile-bottom-nav a:hover { color: var(--primary); background: rgba(40,156,255,.08); }
    .banner-slider {
        height: clamp(170px, 50vw, 230px);
        margin-top: 18px;
        margin-bottom: 24px;
        border-radius: 16px;
    }
    .slider-arrow { width: 38px; height: 38px; font-size: 25px; }
    .slider-prev { left: 8px; }
    .slider-next { right: 8px; }
    .section { padding: 28px 0; }
    .section-head { align-items: flex-start; flex-direction: column; }
    .brand-intro,
    .split-media,
    .app-feature,
    .page-hero-inner { padding: 20px; border-radius: 22px; gap: 22px; }
    .page-hero { padding-top: 22px; }
    .page-hero-media img,
    .content-img { height: 220px; }
    .quick-grid,
    .product-grid,
    .zone-grid,
    .review-grid,
    .grid-2,
    .grid-3,
    .grid-4,
    .grid-5,
    .compliance-grid,
    .footer-grid,
    .stat-row { grid-template-columns: 1fr; }
    .quick-item { min-height: 130px; }
    .zone-card img { height: 165px; }
    .card,
    .info-card,
    .review-card,
    .notice-card { padding: 20px; }
    .footer-bottom { flex-direction: column; }
    .site-footer { padding-bottom: 90px; }
}

@media (max-width: 420px) {
    .header-inner { grid-template-columns: 44px minmax(0, 1fr) auto; }
    .logo img { max-width: 108px; }
    .header-register { padding-inline: 14px; }
    h1 { font-size: 31px; }
    .lead { font-size: 16px; }
    .slider-dots { bottom: 8px; }
}