/* ===== AI 主题色 ===== */
:root {
    --blue: #4F6EF7;
    --indigo: #6C8CFF;
    --violet: #8b5cf6;
    --cyan: #22d3ee;
    --ink: #0f172a;
    --muted: #64748b;
    --hairline: rgba(79,110,247,0.14);
    --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: auto; }
body {
    font-family: 'Inter', '思源黑体', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(180deg, #fafbff 0%, #f3f5fc 50%, #f8f9fd 100%);
    color: #1e293b;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

/* ===== 背景极光 ===== */
body::before {
    content: '';
    position: fixed; top: -250px; right: -250px; width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(79,110,247,0.10) 0%, transparent 62%);
    border-radius: 50%; pointer-events: none; z-index: 0;
    animation: auroraDrift 24s ease-in-out infinite alternate;
}
body::after {
    content: '';
    position: fixed; bottom: -200px; left: -200px; width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(34,211,238,0.09) 0%, transparent 62%);
    border-radius: 50%; pointer-events: none; z-index: 0;
    animation: auroraDrift 30s ease-in-out infinite alternate-reverse;
}

/* ---- 导航栏 ---- */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px clamp(14px, 4vw, 40px);
    background: rgba(255,255,255,0.78);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(79,110,247,0.08);
    position: sticky; top: 0; z-index: 10;
}
.navbar::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(79,110,247,0.45), rgba(34,211,238,0.45), transparent);
}
.logo {
    display: flex; align-items: center; gap: 10px;
    font-size: clamp(1.05rem, 2.4vw, 1.3rem); font-weight: 700; color: var(--blue);
    text-decoration: none; letter-spacing: -0.5px; white-space: nowrap;
}
.logo img { width: clamp(30px, 5vw, 40px); height: clamp(30px, 5vw, 40px); border-radius: 10px; }
.nav-links { display: flex; gap: clamp(12px, 2.6vw, 28px); align-items: center; }
.nav-links a {
    position: relative; text-decoration: none; color: #475569;
    font-size: clamp(0.85rem, 1.8vw, 0.95rem); font-weight: 500;
    transition: color 0.2s; white-space: nowrap;
}
.nav-links a::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -5px; height: 2px;
    border-radius: 2px; transform: scaleX(0); transform-origin: center;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    transition: transform 0.28s ease;
}
.nav-links a:hover { color: var(--blue); }
.nav-links a:hover::after { transform: scaleX(1); }

.lang-toggle {
    background: none;
    border: 1.5px solid #e2e8f0;
    padding: 7px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: clamp(0.78rem, 1.6vw, 0.85rem);
    font-weight: 600;
    color: #475569;
    transition: all 0.2s;
    font-family: inherit;
}
.lang-toggle:hover {
    border-color: var(--blue);
    color: var(--blue);
    background: #f8faff;
}

/* ---- 按钮 ---- */
.btn-outline, .btn-primary {
    position: relative; overflow: hidden; font-family: inherit; cursor: pointer;
    border-radius: 30px; font-weight: 600; font-size: clamp(0.88rem, 1.8vw, 1rem);
    padding: 13px clamp(20px, 3vw, 40px); text-decoration: none;
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-outline {
    background: white; border: 1.5px solid #e2e8f0; color: #334155;
    transition: transform 0.3s, border-color 0.3s, color 0.3s, box-shadow 0.3s, background 0.3s;
}
.btn-outline:hover {
    transform: translateY(-2px);
    border-color: var(--blue); color: var(--blue);
    background: linear-gradient(135deg, #f7faff, #eef2ff);
    box-shadow: 0 10px 26px rgba(79,110,247,0.18);
}
.btn-primary {
    background: linear-gradient(120deg, var(--blue), var(--indigo) 45%, var(--violet));
    background-size: 180% 180%; background-position: 0% 50%;
    border: none; color: #fff;
    transition: transform 0.3s, background-position 0.6s;
    animation: glowPulse 3.4s ease-in-out infinite;
}
.btn-primary:hover { transform: translateY(-2px); background-position: 100% 50%; }
/* 流光扫过 */
.btn-primary::after {
    content: ''; position: absolute; top: 0; bottom: 0; width: 55%; left: -75%;
    transform: skewX(-20deg); pointer-events: none;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
    transition: left 0.65s ease;
}
.btn-primary:hover::after { left: 125%; }

/* ---- 一、首页介绍 ---- */
.hero {
    text-align: center;
    padding: clamp(48px, 8vw, 92px) clamp(16px, 4vw, 20px) clamp(36px, 6vw, 70px);
    max-width: 800px; margin: 0 auto; position: relative; z-index: 1;
}
.hero::before {
    content: ''; position: absolute; inset: -6% 0 auto; height: 80%; z-index: -1;
    background: radial-gradient(70% 90% at 50% 42%, rgba(79,110,247,0.16), rgba(139,92,246,0.06) 50%, transparent 78%);
    pointer-events: none;
}
.hero::after {
    content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background-image:
        linear-gradient(rgba(79,110,247,0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79,110,247,0.055) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(ellipse at 50% 38%, #000 0%, transparent 72%);
    mask-image: radial-gradient(ellipse at 50% 38%, #000 0%, transparent 72%);
    animation: gridDrift 16s linear infinite;
}
/* 划过 hero 的扫描光带 */
.hero-scan {
    position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background: linear-gradient(180deg,
        transparent 0%, rgba(34,211,238,0.07) 46%, rgba(79,110,247,0.14) 50%,
        rgba(34,211,238,0.07) 54%, transparent 100%);
    background-size: 100% 300%; background-repeat: no-repeat;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent);
    animation: scanSweep 9s ease-in-out infinite;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, #EEF2FF, #E8EFFF);
    border: 1px solid rgba(79,110,247,0.18); border-radius: 30px;
    padding: 7px 18px; color: var(--blue); font-weight: 600;
    font-size: clamp(0.78rem, 1.7vw, 0.85rem);
    margin-bottom: clamp(18px, 3vw, 28px); letter-spacing: 0.4px;
}
.hero-badge .dot {
    width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
    animation: dotPulse 2.6s ease-out infinite;
}
.hero h1 {
    font-size: clamp(1.9rem, 5vw, 3.4rem); font-weight: 800; color: var(--ink);
    margin-bottom: clamp(14px, 2vw, 20px); line-height: 1.2; letter-spacing: -1px;
}
.hero h1 span {
    background: linear-gradient(100deg, var(--blue), var(--violet) 35%, #a78bfa 55%, var(--blue));
    background-size: 220% 100%;
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 7s ease-in-out infinite alternate;
}
.hero p {
    font-size: clamp(0.95rem, 2.2vw, 1.2rem);
    color: var(--muted); line-height: 1.7;
}
/* 关键数据条 */
.hero-meta {
    display: flex; flex-wrap: wrap; justify-content: center; align-items: baseline;
    gap: 10px clamp(18px, 4vw, 40px);
    margin-top: clamp(22px, 4vw, 34px); list-style: none;
}
.hero-meta li {
    position: relative; display: inline-flex; align-items: baseline; gap: 8px;
    color: var(--muted); font-size: clamp(0.8rem, 1.7vw, 0.9rem);
}
.hero-meta li + li::before {
    content: ''; position: absolute; top: 50%; transform: translateY(-50%);
    left: calc(-1 * clamp(18px, 4vw, 40px) / 2 - 2px);
    width: 4px; height: 4px; border-radius: 50%;
    background: var(--cyan); opacity: 0.6;
}
.hero-meta b {
    font-family: var(--mono); font-weight: 700; letter-spacing: -0.5px;
    font-size: clamp(1rem, 2.2vw, 1.25rem); color: var(--blue);
}

/* ---- 二、公司主要业务 / 三、下载渠道 ---- */
.features-section {
    max-width: 1200px; margin: 0 auto clamp(48px, 7vw, 80px);
    padding: 0 clamp(16px, 4vw, 20px);
    position: relative; z-index: 1;
}
.section-title { text-align: center; margin-bottom: clamp(28px, 5vw, 56px); }
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--mono); font-size: 0.7rem; font-weight: 700;
    letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--blue); margin-bottom: 12px;
}
.eyebrow::before, .eyebrow::after {
    content: ''; width: 22px; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(79,110,247,0.6));
}
.eyebrow::after { background: linear-gradient(90deg, rgba(79,110,247,0.6), transparent); }
.section-title h2 {
    font-size: clamp(1.45rem, 3.4vw, 2.2rem); font-weight: 700; color: var(--ink);
    margin-bottom: 12px; letter-spacing: -0.5px; line-height: 1.35;
}
.section-title h2::after {
    content: ''; display: block; width: 58px; height: 4px;
    margin: 16px auto 0; border-radius: 4px;
    background: linear-gradient(90deg, var(--blue), var(--violet), var(--cyan));
    box-shadow: 0 3px 14px rgba(79,110,247,0.45);
}
.section-title p { color: var(--muted); font-size: clamp(0.88rem, 1.9vw, 1.05rem); }

.features-grid {
    display: grid; gap: clamp(16px, 2.4vw, 28px);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
}
.feature-card {
    background: linear-gradient(180deg, #ffffff 0%, #fafbff 100%) padding-box,
                linear-gradient(145deg, rgba(79,110,247,0.12), rgba(34,211,238,0.10), rgba(139,92,246,0.08)) border-box;
    border-radius: 28px; padding: clamp(26px, 3.4vw, 32px) clamp(18px, 2.4vw, 24px);
    border: 1px solid transparent;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 30px rgba(0,0,0,0.04);
    transition: all 0.45s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    text-align: center; display: block; text-decoration: none; color: inherit;
    position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 20%; right: 20%; height: 2px;
    background: linear-gradient(90deg, transparent, rgba(34,211,238,0.6), transparent);
    opacity: 0; transition: opacity 0.4s;
}
.feature-card:hover::before { opacity: 1; }
/* 流光扫过 */
.feature-card::after {
    content: ''; position: absolute; top: -60%; left: -130%; width: 70%; height: 220%;
    transform: rotate(18deg); pointer-events: none;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.85), transparent);
    transition: left 0.75s ease;
}
.feature-card:hover::after { left: 140%; }
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 54px rgba(79,110,247,0.2);
    background: linear-gradient(180deg, #ffffff 0%, #fafbff 100%) padding-box,
                linear-gradient(145deg, rgba(79,110,247,0.35), rgba(34,211,238,0.3), rgba(139,92,246,0.28)) border-box;
}
.card-no {
    position: absolute; top: 18px; left: 22px;
    font-family: var(--mono); font-size: 0.72rem; font-weight: 700;
    letter-spacing: 0.1em; color: rgba(79,110,247,0.42);
}
.feature-icon {
    width: clamp(60px, 8vw, 72px); height: clamp(60px, 8vw, 72px);
    display: flex; align-items: center; justify-content: center;
    border-radius: 20px; margin: 0 auto clamp(16px, 2.4vw, 24px);
    background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.4), background 0.3s, box-shadow 0.3s;
}
.feature-card:hover .feature-icon {
    transform: scale(1.08) rotate(-5deg);
    background: linear-gradient(135deg, #E0E7FF, #CFFAFE);
    box-shadow: 0 10px 28px rgba(79,110,247,0.32);
}
.feature-icon img { width: 100%; height: 100%; border-radius: 14px; object-fit: cover; }
.feature-card h3 {
    font-size: clamp(1.1rem, 2.2vw, 1.2rem); font-weight: 700; margin-bottom: 10px;
    color: #1e293b; letter-spacing: -0.3px;
}
.feature-card p {
    color: var(--muted); font-size: clamp(0.86rem, 1.8vw, 0.92rem); line-height: 1.6;
}
.card-tags {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 6px;
    margin-top: 16px;
}
.card-tags span {
    font-size: 0.72rem; padding: 3px 10px; border-radius: 20px;
    color: var(--blue); background: rgba(79,110,247,0.06);
    border: 1px solid var(--hairline); transition: all 0.3s;
}
.feature-card:hover .card-tags span {
    color: #0891b2; background: rgba(34,211,238,0.1);
    border-color: rgba(34,211,238,0.35);
}

/* ---- 三、下载渠道卡片 ---- */
.access-grid {
    display: grid; gap: clamp(16px, 2.4vw, 20px);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
    max-width: 1080px; margin: 0 auto;
}
.access-card {
    background: white; border: 1.5px solid #e2e8f0; border-radius: 20px;
    padding: 28px 22px; text-align: center;
    display: flex; flex-direction: column; align-items: center;
    position: relative; overflow: hidden;
    transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}
.access-card::before {
    content: ''; position: absolute; top: 0; left: 22%; right: 22%; height: 2px;
    background: linear-gradient(90deg, transparent, rgba(34,211,238,0.65), transparent);
    opacity: 0; transition: opacity 0.35s;
}
.access-card:hover::before { opacity: 1; }
.access-card:hover {
    border-color: var(--blue); transform: translateY(-4px);
    box-shadow: 0 14px 40px rgba(79,110,247,0.18);
}
.access-tag {
    font-size: 1.15rem; font-weight: 700; color: var(--ink); margin-bottom: 12px;
}
.access-desc {
    font-size: 0.95rem; color: var(--muted); line-height: 1.6;
    margin-bottom: 18px; flex: 1;
}
/* 版本信息 */
.access-meta { width: 100%; margin-bottom: 18px; list-style: none; }
.access-meta > div {
    display: flex; justify-content: space-between; align-items: center; gap: 10px;
    padding: 8px 2px; border-top: 1px solid rgba(79,110,247,0.12);
}
.access-meta dt { color: #94a3b8; font-size: 0.76rem; }
.access-meta dd { font-family: var(--mono); font-size: 0.78rem; color: #334155; }
.access-meta dd.ok { color: #059669; }
.access-card .btn-outline, .access-card .btn-primary {
    width: 100%; padding-left: 16px; padding-right: 16px;
}

/* ---- 页脚 ---- */
.site-footer {
    position: relative; z-index: 1;
    display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
    gap: 8px clamp(16px, 3vw, 28px);
    padding: clamp(26px, 4vw, 36px) clamp(16px, 4vw, 20px) clamp(30px, 5vw, 44px);
    font-size: 0.78rem; color: #94a3b8;
}
.site-footer::before {
    content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: min(1100px, 92%); height: 1px;
    background: linear-gradient(90deg, transparent, rgba(79,110,247,0.35), rgba(34,211,238,0.35), transparent);
}
.footer-links {
    display: inline-flex; flex-wrap: wrap; justify-content: center;
    gap: 8px clamp(12px, 3vw, 24px);
}
.footer-links a { color: #94a3b8; text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--blue); }

/* ---- 三、关于我们 ---- */
.about-section {
    max-width: 1200px; margin: 0 auto clamp(48px, 7vw, 80px);
    padding: 0 clamp(16px, 4vw, 20px);
    position: relative; z-index: 1;
}
.about-inner {
    position: relative; overflow: hidden;
    display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    padding: clamp(26px, 4vw, 44px);
    background: linear-gradient(180deg, #ffffff 0%, #fafbff 100%) padding-box,
                linear-gradient(145deg, rgba(79,110,247,0.14), rgba(34,211,238,0.12), rgba(139,92,246,0.10)) border-box;
    border: 1px solid transparent; border-radius: 28px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 10px 40px rgba(0,0,0,0.04);
}
.about-inner::before {
    content: ''; position: absolute; top: -45%; right: -10%; width: 46%; height: 140%;
    background: radial-gradient(circle, rgba(79,110,247,0.11), transparent 65%);
    pointer-events: none;
}
.about-copy { position: relative; }
.about-copy h2 {
    font-size: clamp(1.35rem, 3vw, 2rem); font-weight: 700; color: var(--ink);
    letter-spacing: -0.5px; line-height: 1.35;
}
.about-copy h2::after {
    content: ''; display: block; width: 58px; height: 4px;
    margin: 14px 0 18px; border-radius: 4px;
    background: linear-gradient(90deg, var(--blue), var(--violet), var(--cyan));
    box-shadow: 0 3px 14px rgba(79,110,247,0.45);
}
.about-copy p { color: var(--muted); font-size: clamp(0.9rem, 1.9vw, 1rem); line-height: 1.9; }
.about-facts { position: relative; align-content: start; }
.about-facts > div {
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    padding: 11px 0; border-top: 1px solid rgba(79,110,247,0.12);
}
.about-facts > div:first-child { border-top: none; padding-top: 2px; }
.about-facts dt { color: #94a3b8; font-size: 0.8rem; }
.about-facts dd { font-family: var(--mono); font-size: 0.82rem; color: #334155; }
.about-facts dd a { color: var(--blue); text-decoration: none; }
.about-facts dd a:hover { text-decoration: underline; }

/* ---- 动画 ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: none; }
}
@keyframes gradientShift {
    from { background-position: 0% 50%; }
    to { background-position: 100% 50%; }
}
@keyframes glowPulse {
    0%, 100% { box-shadow: 0 6px 24px rgba(79,110,247,0.35); }
    50% { box-shadow: 0 12px 36px rgba(79,110,247,0.6); }
}
@keyframes auroraDrift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(-60px, 50px, 0) scale(1.15); }
}
@keyframes dotPulse {
    0% { box-shadow: 0 0 0 0 rgba(34,211,238,0.55); }
    70% { box-shadow: 0 0 0 8px rgba(34,211,238,0); }
    100% { box-shadow: 0 0 0 0 rgba(34,211,238,0); }
}
@keyframes gridDrift {
    to { background-position: 46px 46px, 46px 46px; }
}
@keyframes scanSweep {
    from { background-position: 0 -100%; }
    to { background-position: 0 200%; }
}
@keyframes riseIn {
    from { opacity: 0; translate: 0 32px; }
    to { opacity: 1; translate: none; }
}
/* 入场：一次性播放，不用滚动时间轴（页面短到不能滚动时滚动动画会卡在半透明） */
.hero { animation: fadeInUp 0.7s ease-out both; }
.features-section, .about-section { animation: riseIn 0.7s ease-out both; }
#download { animation-delay: 0.08s; }
#business { animation-delay: 0.14s; }
#about { animation-delay: 0.2s; }
.feature-card, .access-card { animation: riseIn 0.6s cubic-bezier(0.25, 0.8, 0.25, 1.2) both; }
.feature-card:nth-child(1), .access-card:nth-child(1) { animation-delay: 0.18s; }
.feature-card:nth-child(2), .access-card:nth-child(2) { animation-delay: 0.28s; }
.feature-card:nth-child(3) { animation-delay: 0.38s; }

.icon { width: 20px; height: 20px; vertical-align: middle; }

/* ---- 窄屏收尾 ---- */
@media (max-width: 860px) {
    .about-inner { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .nav-links { gap: 12px; }
    .section-title { margin-bottom: 26px; }
    .eyebrow { font-size: 0.66rem; letter-spacing: 0.18em; }
    .hero-meta { gap: 8px 16px; }
    .hero-meta li + li::before { left: -9px; }
    .card-no { top: 14px; left: 18px; }
    .feature-card, .about-inner { border-radius: 24px; }
}

/* ---- 关掉动效偏好 ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}