:root {
    --bg: #f3f8fb;
    --bg-deep: #071b2a;
    --panel: rgba(255, 255, 255, 0.84);
    --panel-strong: #ffffff;
    --panel-dark: rgba(9, 32, 49, 0.9);
    --text: #102434;
    --muted: #5f7180;
    --line: rgba(15, 97, 140, 0.12);
    --primary: #0ea5d8;
    --primary-strong: #0573a6;
    --accent: #14c59a;
    --accent-soft: rgba(20, 197, 154, 0.14);
    --shadow-lg: 0 30px 80px rgba(6, 41, 63, 0.12);
    --shadow-md: 0 18px 42px rgba(8, 39, 59, 0.1);
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-pill: 999px;
    --max-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Avenir Next", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.65;
    background:
        radial-gradient(circle at top left, rgba(20, 197, 154, 0.16), transparent 24%),
        radial-gradient(circle at top right, rgba(14, 165, 216, 0.2), transparent 26%),
        linear-gradient(180deg, #fbfeff 0%, #eef6fa 48%, #f9fcfd 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(10, 63, 94, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 63, 94, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 80%);
}

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

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

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

h1,
h2,
h3,
h4 {
    margin: 0;
    color: var(--text);
    line-height: 1.08;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.container {
    width: min(var(--max-width), calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(243, 248, 251, 0.78);
    backdrop-filter: blur(18px);
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 82px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand img {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    box-shadow: 0 12px 28px rgba(5, 115, 166, 0.18);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-links a {
    padding: 10px 16px;
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 700;
    color: var(--muted);
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
    color: var(--primary-strong);
    background: rgba(14, 165, 216, 0.1);
    transform: translateY(-1px);
}

.nav-links a.nav-download {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    box-shadow: 0 12px 28px rgba(5, 115, 166, 0.18);
}

.nav-links a.nav-download:hover,
.nav-links a.nav-download[aria-current="page"] {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
}

.hero {
    padding: 78px 0 54px;
}

.hero-grid,
.split-grid,
.cta-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 34px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 36px;
    padding: 0 16px;
    border-radius: var(--radius-pill);
    background: rgba(14, 165, 216, 0.1);
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 720px;
    margin-top: 16px;
    font-size: clamp(34px, 5.8vw, 58px);
    letter-spacing: -0.06em;
}

.hero .lead {
    max-width: 660px;
    margin-top: 18px;
    font-size: 16px;
}

.hero-actions,
.download-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 30px;
}

.hero-actions .btn-primary {
    min-height: 54px;
    padding: 0 26px;
    font-size: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    font-weight: 800;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    box-shadow: 0 18px 34px rgba(5, 115, 166, 0.2);
}

.btn-secondary {
    color: var(--primary-strong);
    background: rgba(255, 255, 255, 0.72);
    border-color: rgba(5, 115, 166, 0.14);
}

.btn-dark {
    color: #ffffff;
    background: rgba(7, 27, 42, 0.94);
    box-shadow: 0 16px 34px rgba(7, 27, 42, 0.22);
}

.hero-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 30px;
}

.hero-download-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    padding: 14px 16px;
    border: 1px solid rgba(14, 165, 216, 0.12);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--shadow-md);
}

.hero-download-strip strong {
    color: var(--text);
    font-size: 14px;
}

.hero-download-strip span,
.hero-download-strip a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 800;
}

.hero-download-strip span {
    color: var(--primary-strong);
    background: rgba(14, 165, 216, 0.08);
}

.hero-download-strip a {
    margin-left: auto;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    box-shadow: 0 12px 24px rgba(5, 115, 166, 0.16);
}

.hero-points li,
.metric-card,
.glass-card,
.feature-card,
.scenario-card,
.download-card,
.step-card,
.faq-card,
.cta-box,
.timeline,
.device-board,
.support-card {
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-xl);
    background: var(--panel);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
}

.hero-points li {
    padding: 18px 20px;
}

.hero-points strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text);
    font-size: 26px;
    line-height: 1;
}

.hero-visual {
    position: relative;
}

.glass-card {
    padding: 28px;
}

.floating-badge,
.status-pill,
.mini-tag {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 800;
}

.floating-badge {
    position: absolute;
    right: 18px;
    top: -16px;
    color: #ffffff;
    background: linear-gradient(135deg, #14c59a, #0ea5d8);
    box-shadow: 0 16px 30px rgba(14, 165, 216, 0.24);
}

.hero-stack {
    display: grid;
    gap: 18px;
}

.app-box {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 18px;
    align-items: center;
}

.app-box.no-icon {
    grid-template-columns: 1fr;
}

.app-box img {
    width: 72px;
    height: 72px;
    border-radius: 22px;
}

.status-pill {
    color: var(--accent);
    background: var(--accent-soft);
}

.mini-tag {
    color: var(--primary-strong);
    background: rgba(14, 165, 216, 0.08);
}

.mini-grid,
.stats-grid,
.feature-grid,
.scenario-grid,
.download-grid,
.steps-grid,
.faq-grid,
.support-grid,
.footer-grid {
    display: grid;
    gap: 20px;
}

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

.metric-card {
    padding: 20px;
}

.metric-card span {
    display: block;
    margin-bottom: 10px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.metric-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 30px;
    line-height: 1;
}

.section {
    padding: 38px 0 82px;
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 22px;
    margin-bottom: 30px;
}

.section-head h2 {
    max-width: 640px;
    font-size: clamp(32px, 4.8vw, 56px);
    letter-spacing: -0.05em;
}

.section-head p {
    max-width: 520px;
    font-size: 17px;
}

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

.feature-card,
.scenario-card,
.download-card,
.step-card,
.faq-card,
.support-card {
    padding: 28px;
}

.card-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin-bottom: 18px;
    border-radius: 14px;
    color: var(--primary-strong);
    background: rgba(14, 165, 216, 0.1);
    font-weight: 800;
}

.feature-card h3,
.scenario-card h3,
.download-card h3,
.step-card h3,
.faq-card h3,
.support-card h3 {
    margin-bottom: 12px;
    font-size: 22px;
    letter-spacing: -0.03em;
}

.band {
    padding: 82px 0;
    background:
        radial-gradient(circle at 10% 20%, rgba(20, 197, 154, 0.18), transparent 20%),
        linear-gradient(135deg, #071b2a 0%, #0b3045 52%, #0a5876 100%);
}

.band .section-head h2,
.band .section-head p,
.band .eyebrow,
.band p,
.band li,
.band h3 {
    color: #ffffff;
}

.band .eyebrow {
    background: rgba(255, 255, 255, 0.12);
}

.timeline {
    padding: 30px;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: none;
}

.timeline ul {
    display: grid;
    gap: 16px;
}

.timeline li {
    display: grid;
    grid-template-columns: 88px 1fr;
    gap: 16px;
    align-items: start;
}

.timeline strong {
    color: #8de0ff;
}

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

.download-hero {
    padding-bottom: 34px;
}

.device-board {
    position: relative;
    overflow: hidden;
    padding: 28px;
}

.device-board::after {
    content: "";
    position: absolute;
    right: -80px;
    bottom: -110px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(14, 165, 216, 0.22), transparent 68%);
}

.device-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.device-header img {
    width: 66px;
    height: 66px;
    border-radius: 18px;
}

.device-specs {
    display: grid;
    gap: 12px;
}

.device-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    background: rgba(14, 165, 216, 0.06);
}

.device-row strong {
    color: var(--text);
}

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

.download-card {
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto auto;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(20, 197, 154, 0.16), transparent 64%);
}

.download-card .meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
}

.download-card ul {
    display: grid;
    gap: 10px;
    margin: 18px 0 24px;
}

.download-card li,
.support-card li {
    position: relative;
    padding-left: 18px;
}

.download-card li::before,
.support-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

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

.step-card strong {
    display: block;
    margin-bottom: 16px;
    color: var(--primary-strong);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

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

.cta-shell {
    padding-bottom: 90px;
}

.cta-box {
    padding: 36px;
    background:
        linear-gradient(135deg, rgba(7, 27, 42, 0.96), rgba(10, 88, 118, 0.96));
}

.cta-box h2,
.cta-box p,
.cta-box .eyebrow {
    color: #ffffff;
}

.cta-box .eyebrow {
    background: rgba(255, 255, 255, 0.12);
}

.cta-box p {
    max-width: 620px;
    margin: 18px 0 28px;
}

.site-footer {
    padding: 34px 0 54px;
}

.footer-grid {
    grid-template-columns: 1.3fr 1fr 1fr;
    padding: 28px 30px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.76);
    box-shadow: var(--shadow-md);
}

.footer-grid h3 {
    margin-bottom: 12px;
    font-size: 18px;
}

.footer-grid a {
    display: block;
    margin-top: 10px;
    color: var(--muted);
}

.footer-grid a:hover {
    color: var(--primary-strong);
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-copy,
.hero-visual,
.section-head,
.feature-card,
.scenario-card,
.download-card,
.step-card,
.faq-card,
.support-card,
.cta-box {
    animation: riseIn 0.65s ease both;
}

.feature-card:nth-child(2),
.scenario-card:nth-child(2),
.download-card:nth-child(2),
.step-card:nth-child(2),
.faq-card:nth-child(2),
.support-card:nth-child(2) {
    animation-delay: 0.08s;
}

.feature-card:nth-child(3),
.scenario-card:nth-child(3),
.download-card:nth-child(3),
.step-card:nth-child(3) {
    animation-delay: 0.16s;
}

.feature-card:nth-child(4),
.download-card:nth-child(4) {
    animation-delay: 0.24s;
}

@media (max-width: 1080px) {
    .feature-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .scenario-grid,
    .steps-grid,
    .mini-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .hero-grid,
    .split-grid,
    .cta-panel,
    .download-grid,
    .faq-grid,
    .support-grid {
        grid-template-columns: 1fr;
    }

    .section-head {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 720px) {
    .container {
        width: min(var(--max-width), calc(100% - 28px));
    }

    .nav-wrap {
        align-items: flex-start;
        flex-direction: column;
        padding: 16px 0;
    }

    .hero {
        padding-top: 56px;
    }

    .hero-points,
    .feature-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .timeline li {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}

@media (max-width: 560px) {
    .btn,
    .download-actions a {
        width: 100%;
    }

    .hero-download-strip a {
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }

    .hero h1 {
        font-size: clamp(30px, 9.2vw, 42px);
    }

    .footer-grid,
    .feature-card,
    .scenario-card,
    .download-card,
    .step-card,
    .faq-card,
    .support-card,
    .glass-card,
    .timeline,
    .cta-box {
        padding: 22px;
    }
}