:root {
    --ink: #111318;
    --muted: #626a76;
    --paper: #ffffff;
    --paper-soft: rgba(255, 255, 255, 0.82);
    --line: rgba(17, 19, 24, 0.1);
    --shadow: 0 24px 70px rgba(16, 24, 40, 0.12);
    --shadow-soft: 0 14px 40px rgba(16, 24, 40, 0.08);
    --radius: 8px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    color: var(--ink) !important;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif !important;
    background:
        linear-gradient(90deg, rgba(17, 19, 24, 0.035) 1px, transparent 1px),
        linear-gradient(rgba(17, 19, 24, 0.035) 1px, transparent 1px),
        linear-gradient(180deg, #fbfcfd 0%, #eef3f8 46%, #ffffff 100%) !important;
    background-size: 48px 48px, 48px 48px, auto !important;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        linear-gradient(120deg, rgba(0, 122, 255, 0.12), transparent 32%),
        linear-gradient(300deg, transparent 52%, rgba(52, 199, 89, 0.11));
    mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.74) 32%, transparent 76%);
}

a {
    color: inherit;
}

.header {
    position: fixed !important;
    top: 18px !important;
    left: 50% !important;
    right: auto !important;
    width: min(calc(100% - 32px), 1160px) !important;
    transform: translateX(-50%);
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 18px !important;
    padding: 10px 12px 10px 16px !important;
    border: 1px solid rgba(255, 255, 255, 0.48);
    border-radius: 999px;
    color: #fff !important;
    background: rgba(15, 18, 24, 0.68) !important;
    backdrop-filter: blur(22px) saturate(130%);
    -webkit-backdrop-filter: blur(22px) saturate(130%);
    box-shadow: 0 18px 50px rgba(15, 23, 42, 0.18);
    z-index: 1000 !important;
    animation: headerDrop 700ms var(--ease) both;
}

.logo-link {
    display: inline-flex !important;
    align-items: center !important;
    gap: 10px !important;
    min-width: 0;
    color: currentColor !important;
    text-decoration: none !important;
    font-weight: 760;
    white-space: nowrap;
}

.logo-link img,
.logo-mark {
    width: 32px !important;
    height: 32px !important;
    border-radius: 8px !important;
    object-fit: cover;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
}

.header .logo-link:not(:has(img)):not(:has(.logo-mark))::before {
    content: "A";
    display: grid;
    width: 32px;
    height: 32px;
    place-items: center;
    border-radius: 8px;
    color: #111318;
    background: #fff;
    box-shadow: inset 0 -8px 20px rgba(15, 18, 24, 0.08);
}

.nav {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
}

.nav a,
.lang-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    min-height: 36px !important;
    padding: 0 14px !important;
    border: 1px solid transparent !important;
    border-radius: 999px !important;
    color: currentColor !important;
    background: transparent !important;
    text-decoration: none !important;
    font-size: 0.92rem !important;
    font-weight: 650 !important;
    opacity: 0.88;
    cursor: pointer;
    transition: transform 240ms var(--ease), background 240ms ease, border-color 240ms ease, opacity 240ms ease !important;
}

.nav a:hover,
.nav a.active,
.lang-btn:hover {
    opacity: 1;
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.14) !important;
    border-color: rgba(255, 255, 255, 0.18) !important;
}

.menu-button {
    display: none !important;
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 999px !important;
    color: currentColor !important;
    background: rgba(255, 255, 255, 0.14) !important;
    cursor: pointer;
    font-size: 0 !important;
}

.menu-button::before {
    content: "☰";
    font-size: 1.3rem;
    line-height: 1;
}

.hero {
    min-height: 94svh !important;
    height: auto !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 124px 24px 72px !important;
    overflow: hidden;
    text-align: left !important;
    isolation: isolate;
    background:
        linear-gradient(135deg, rgba(12, 14, 18, 0.98), rgba(28, 34, 42, 0.95)),
        linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px) !important;
    background-size: auto, 54px 54px, 54px 54px !important;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(115deg, transparent 0%, rgba(255, 255, 255, 0.08) 22%, transparent 38%),
        linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.38) 100%);
    animation: lightSweep 10s var(--ease) infinite alternate;
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 150px;
    z-index: -1;
    background: linear-gradient(180deg, transparent, rgba(245, 247, 250, 0.95));
}

.hero-content {
    width: min(1160px, 100%);
    opacity: 1 !important;
    transform: none !important;
    animation: revealUp 900ms var(--ease) 120ms both !important;
}

.hero h1 {
    max-width: 760px;
    margin: 0 0 18px !important;
    color: #fff;
    font-size: clamp(2.65rem, 7vw, 6.4rem) !important;
    line-height: 0.96;
    letter-spacing: 0;
    font-weight: 850 !important;
}

.hero p {
    max-width: 680px;
    margin: 0 0 42px !important;
    color: rgba(255, 255, 255, 0.74) !important;
    font-size: clamp(1rem, 1.8vw, 1.24rem) !important;
}

.apps-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)) !important;
    gap: 16px !important;
    width: 100%;
    max-width: 1160px !important;
    margin: 0 !important;
}

.app-card {
    --accent: #0a84ff;
    position: relative;
    display: grid;
    min-height: 292px;
    padding: 22px !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
    border-radius: var(--radius) !important;
    overflow: hidden;
    text-align: left !important;
    background: rgba(255, 255, 255, 0.08) !important;
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.24) !important;
    opacity: 1 !important;
    transform: translateY(0) !important;
    animation: cardIn 760ms var(--ease) both;
    transition: transform 340ms var(--ease), border-color 340ms ease, background 340ms ease, box-shadow 340ms ease !important;
}

.app-card:nth-child(1) { --accent: #34c759; animation-delay: 170ms; }
.app-card:nth-child(2) { --accent: #ff9f0a; animation-delay: 250ms; }
.app-card:nth-child(3) { --accent: #0a84ff; animation-delay: 330ms; }
.app-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(120deg, transparent 22%, rgba(255, 255, 255, 0.2), transparent 42%);
    transform: translateX(-120%);
    transition: transform 700ms var(--ease);
}

.app-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0.34);
    transform-origin: left;
    transition: transform 360ms var(--ease);
}

.app-card:hover {
    transform: translateY(-8px) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    background: rgba(255, 255, 255, 0.12) !important;
    box-shadow: 0 28px 78px rgba(0, 0, 0, 0.32) !important;
}

.app-card:hover::before {
    transform: translateX(120%);
}

.app-card:hover::after {
    transform: scaleX(1);
}

.app-icon {
    width: 76px !important;
    height: 76px !important;
    margin: 0 0 30px !important;
    border-radius: 18px !important;
    object-fit: cover;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.28) !important;
    transition: transform 420ms var(--ease), box-shadow 420ms ease;
}

.app-card:hover .app-icon {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 22px 54px rgba(0, 0, 0, 0.36) !important;
}

.app-card h2 {
    color: #fff !important;
    font-size: 1.62rem !important;
    line-height: 1.15;
    font-weight: 820;
}

.app-card .subtitle {
    min-height: 54px;
    color: rgba(255, 255, 255, 0.72) !important;
    font-size: 0.96rem;
}

.app-links {
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: flex-start !important;
    gap: 8px !important;
    align-self: end;
    margin-top: 22px;
}

.app-link {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 36px;
    padding: 0 12px !important;
    border: 1px solid rgba(255, 255, 255, 0.18) !important;
    border-radius: 999px !important;
    color: #fff !important;
    text-decoration: none !important;
    font-size: 0.88rem !important;
    font-weight: 720;
    white-space: nowrap;
    transition: transform 240ms var(--ease), background 240ms ease, border-color 240ms ease !important;
}

.app-link:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.1) !important;
    border-color: rgba(255, 255, 255, 0.34) !important;
}

.app-link.primary {
    color: #111318 !important;
    background: #fff !important;
    border-color: #fff !important;
}

.features {
    padding: 88px 20px 72px !important;
    background: linear-gradient(180deg, rgba(245, 247, 250, 0.94), #fff 28%, #f8fafc 100%) !important;
}

.features > div,
.container,
.content {
    width: min(100% - 40px, 1160px);
}

.container,
.content {
    max-width: 860px !important;
    margin: 112px auto 46px !important;
    padding: 30px !important;
    border: 1px solid rgba(17, 19, 24, 0.08);
    border-radius: var(--radius) !important;
    background: var(--paper-soft) !important;
    box-shadow: var(--shadow-soft) !important;
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
    animation: revealUp 620ms var(--ease) both;
}

.features h2,
.faq-title,
.content h1,
.container h1 {
    color: var(--ink) !important;
    letter-spacing: 0;
}

.faq-title,
.content h1 {
    font-size: clamp(2rem, 5vw, 3.2rem) !important;
    line-height: 1.08;
}

.features-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)) !important;
    gap: 14px !important;
    max-width: 1160px !important;
}

.feature-card,
.faq-item,
.faq-category,
.highlight,
.contact-section {
    border: 1px solid rgba(17, 19, 24, 0.08) !important;
    border-radius: var(--radius) !important;
    background: rgba(255, 255, 255, 0.82) !important;
    box-shadow: var(--shadow-soft) !important;
    transform: translateY(0);
    transition: transform 300ms var(--ease), box-shadow 300ms ease, border-color 300ms ease, background 300ms ease !important;
}

.feature-card {
    min-height: 176px;
    opacity: 1 !important;
    animation: revealUp 620ms var(--ease) both;
}

.feature-card:hover,
.faq-item:hover,
.contact-section:hover {
    transform: translateY(-5px) !important;
    border-color: rgba(17, 19, 24, 0.14) !important;
    background: #fff !important;
    box-shadow: var(--shadow) !important;
}

.faq-item {
    overflow: hidden;
    animation: revealUp 520ms var(--ease) both;
}

.faq-item:nth-of-type(2n) {
    animation-delay: 60ms;
}

.faq-item:nth-of-type(3n) {
    animation-delay: 120ms;
}

.faq-question {
    color: var(--ink) !important;
}

.faq-answer,
.content p,
.content li,
.container p {
    color: var(--muted) !important;
}

.faq-answer {
    border-color: rgba(17, 19, 24, 0.08) !important;
}

.faq-category,
.highlight {
    border-left: 4px solid #0a84ff !important;
}

.contact-section a,
.content a {
    color: #0a66d8;
}

footer {
    padding: 28px 20px 36px !important;
    color: #717986 !important;
    background: #f8fafc;
}

footer a {
    color: inherit !important;
    text-decoration: none !important;
}

footer a:hover {
    color: var(--ink) !important;
}

@keyframes headerDrop {
    from {
        opacity: 0;
        transform: translate(-50%, -18px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

@keyframes revealUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes cardIn {
    from {
        opacity: 0;
        transform: translateY(32px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes lightSweep {
    from {
        transform: translateX(-18%);
    }
    to {
        transform: translateX(14%);
    }
}

@media (max-width: 780px) {
    body {
        background-size: 36px 36px, 36px 36px, auto !important;
    }

    .header {
        top: 12px !important;
        width: min(calc(100% - 24px), 1160px) !important;
        border-radius: 22px !important;
    }

    .menu-button {
        display: block !important;
    }

    .nav {
        position: absolute !important;
        top: calc(100% + 8px) !important;
        left: 0 !important;
        right: 0 !important;
        display: grid !important;
        gap: 4px !important;
        min-width: 0 !important;
        padding: 8px !important;
        border: 1px solid rgba(255, 255, 255, 0.26);
        border-radius: 18px !important;
        background: rgba(15, 18, 24, 0.94) !important;
        box-shadow: 0 22px 60px rgba(15, 23, 42, 0.22);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity 220ms ease, transform 220ms var(--ease) !important;
    }

    .nav.show {
        display: grid !important;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav a,
    .lang-btn {
        width: 100% !important;
        min-height: 42px !important;
        margin: 0 !important;
        padding: 0 14px !important;
    }

    .hero {
        min-height: auto !important;
        padding: 112px 16px 58px !important;
    }

    .hero h1 {
        font-size: clamp(2.35rem, 13vw, 3.4rem) !important;
    }

    .hero p {
        margin-bottom: 30px !important;
    }

    .apps-grid,
    .features-grid {
        grid-template-columns: 1fr !important;
    }

    .app-card {
        min-height: 252px;
        padding: 20px !important;
    }

    .app-links {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }

    .app-link {
        width: 100%;
        padding-right: 10px !important;
        padding-left: 10px !important;
    }

    .container,
    .content {
        width: min(calc(100% - 28px), 860px) !important;
        margin-top: 98px !important;
        padding: 22px !important;
    }
}

@media (max-width: 380px) {
    .app-links {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-delay: 0ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}